BMW Engine Parts

Blue Thermostat Caps (pair)

T#:54139632

Part#: BMS-TCP-BLU

Ships in 1 Business Day

$ 29.00 USD

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$ 29.00 USD

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BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit - G2X/G42/A...

T#:49822554

Part#: BMSB58OCCFCDV

Ships on Sep 1, 2026

$ 139.00 USD

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$ 139.00 USD

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Keep crankcase vapors in check and your intake air clean with the BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit for the Gen2 B58. This upgrade ditches the flimsy factory venting in favor of a precision CNC-machined billet oil filler cap and dual-vent fittings engineered to handle increased crankcase pressure under boost. By diverting oil-laden vapors into a catch can instead of back through the intake, this system helps minimize carbon buildup, reduces oily contamination, and promotes more consistent performance as power levels climb. High-quality hoses and fittings ensure a secure, leak-free install that won’t collapse under pressure and maintains a clean, OE-plus appearance in the engine bay. An easy, effective upgrade for B58 enthusiasts looking for cleaner operation, improved engine longevity, and proven performance-focused design

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Blue B58 BMW Coil Upgrade Adapter Kit - N55

T#:49857415

Part#: BMSN55CUAK

Back Ordered

$ 199.00 USD

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$ 199.00 USD

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Upgrade your N55 ignition system with the N55 → B58 Coil Upgrade Adapter Kit, engineered for a seamless, plug-and-play conversion. This kit lets you run modern B58-style pencil coils on your N55 without modifying the factory harness or compromising valve cover integrity. Why Upgrade: While the N55 is a reliable platform, factory coils can struggle under high boost, heat, and load. B58 coils deliver stronger, more consistent spark, and this adapter kit ensures a clean, OEM-quality integration. Features & Benefits: Direct-fit adapter harness & mounts for straightforward B58 coil installation Plug-and-play design — no cutting, splicing, or permanent modifications Secure coil seating & alignment for consistent performance and reliability Improved ignition stability under high-load or tuned conditions, helping reduce misfires Applications: Stage 1–3 N55 builds, turbo upgrades, ethanol blends, track use, and aggressive daily driving Drivers looking to eliminate heat- and boost-related ignition issues Anyone seeking an OEM+ quality coil upgrade without a messy DIY install Result: A clean, professional installation that modernizes your ignition system and delivers reliable spark performance under all conditions. If you provide the kit’s brand/part number and whether your valve cover is stock or aftermarket, I can refine this description for precise fitment and application.

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JB4PRO Flex Fuel Add On Harness - B58/S58

T#:49822568

Part#: JB4PB58FFAOH

In Stock

$ 49.00 USD

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$ 49.00 USD

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Take your B58 or S58 build further with the JB4PRO Flex Fuel Add-On Harness—a simple, plug-and-play way to add an ethanol sensor and optional fuel pressure sensor to your JB4PRO setup. Keep your install clean, your wiring organized, and your tune dialed to match every fuel blend in the tank. Why it matters: Plug & Play: Connects directly to your JB4PRO—no cutting or splicing required. Sensor Ready: Supports ethanol and fuel pressure sensors for precise, real-time fueling adjustments. Clean, Safe Installation: Includes a 12 V adapter and inline fuse for hassle-free integration. How it works: This harness links your JB4PRO tuner to your flex fuel hardware. It’s not a complete flex fuel kit—you still need a compatible ethanol sensor—but it gives your JB4PRO the accurate readings it needs to adjust timing, boost, and fueling for E30, E50, or E85 blends.

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Intensity Lithium-ION Battery - i34RX - 11.5lbs

T#:54388454

Part#: I34RX

Ships in 6 Business Days

$ 949.99 USD

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$ 949.99 USD

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Whether you're building a dedicated track weapon or upgrading your street machine for ultimate reliability, unsprung and upper-chassis weight is the enemy of performance. Positioned high up in the engine bay or rear corners, a heavy factory battery negatively impacts your car's center of gravity.

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Turbo & Intake Heat Shield - Gen2 B58

T#:49857413

Part#: BMSG2B58THS

Ships on Sep 1, 2026

$ 119.00 USD

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$ 119.00 USD

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Keep heat where it belongs and boost where it counts with a B58 Turbo & Intake Heat Shield for BMW and Toyota Supra—an OE-plus style upgrade that helps your setup stay cooler, more consistent, and happier when you’re leaning on it. BMW’s factory heat management is fine at stock-ish levels, but once you start turning the wick up, the turbo becomes a rolling space heater. That radiant heat soaks the nearby intake tract, nudging IATs up and making performance less repeatable pull after pull. This shield steps in as a dedicated barrier between the turbo and intake components, helping reduce heat soak so you can keep intake air cooler and denser when you’re driving it like you mean it. Built with a clean, factory-inspired mindset, it’s precision-formed to wrap neatly around the B58 turbo and intake area, and it mounts using factory locations for a tidy, OEM-level install. No cutting, no permanent changes, and fully reversible—just a straightforward bolt-on that looks right at home in the engine bay. Made from durable, heat-resistant materials, it’s designed to handle the heat long-term without turning into a crispy science project. Why it matters Cuts down radiant heat from the turbocharger into the intake area Helps reduce intake air temperature creep Improves consistency during repeated pulls and hard driving Adds protection for surrounding components exposed to turbo heat Features & highlights Designed for BMW B58 and Toyota Supra applications Precision-formed for OEM-level fitment Heat-resistant construction for long-term durability Bolt-on install using factory mounting points Clean, OE-plus under-hood appearance

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Blue B58 BMW Coil Upgrade Adapter Kit - N54

T#:49857414

Part#: BMSN54CUAK

Ships on Sep 1, 2026

$ 199.00 USD

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$ 199.00 USD

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Modernize your N54 ignition system with this N54 to B58 Coil Upgrade Adapter Kit, engineered to deliver an OEM-quality conversion for improved spark energy and consistency. Designed to pair B58-style pencil coils with the factory N54 engine harness, this kit provides a clean, reversible installation—no cutting, splicing, or guesswork required. Key Features & Benefits: Direct-fit adapter solution to run B58 coils on N54 applications Plug-and-play wiring integrates with the factory N54 harness for a factory-like install Secure coil positioning helps ensure proper seating and reliable long-term fitment Improved ignition stability under higher cylinder pressures—ideal for tuned, higher-boost setups Clean, serviceable conversion that maintains a tidy engine bay and simplifies future maintenance Ideal For: Stock to heavily modified N54 builds Vehicles running elevated boost, ethanol blends, or upgraded turbo systems Owners looking to reduce ignition-related misfires and improve combustion consistency under load If you share the brand/part number of the kit and which coils you’re pairing it with, I can tailor the write-up to match the exact components and fitment notes.

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Turbo & Intake Heat Shield - Gen1 B58

T#:49857410

Part#: BMSB58THS

Ships on Sep 1, 2026

$ 119.00 USD

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$ 119.00 USD

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Keep heat where it belongs and boost where it counts with a B58 Turbo & Intake Heat Shield for BMW and Toyota Supra—an OE-plus style upgrade that helps your setup stay cooler, more consistent, and happier when you’re leaning on it. BMW’s factory heat management is fine at stock-ish levels, but once you start turning the wick up, the turbo becomes a rolling space heater. That radiant heat soaks the nearby intake tract, nudging IATs up and making performance less repeatable pull after pull. This shield steps in as a dedicated barrier between the turbo and intake components, helping reduce heat soak so you can keep intake air cooler and denser when you’re driving it like you mean it. Built with a clean, factory-inspired mindset, it’s precision-formed to wrap neatly around the B58 turbo and intake area, and it mounts using factory locations for a tidy, OEM-level install. No cutting, no permanent changes, and fully reversible—just a straightforward bolt-on that looks right at home in the engine bay. Made from durable, heat-resistant materials, it’s designed to handle the heat long-term without turning into a crispy science project. Why it matters Cuts down radiant heat from the turbocharger into the intake area Helps reduce intake air temperature creep Improves consistency during repeated pulls and hard driving Adds protection for surrounding components exposed to turbo heat Features & highlights Designed for BMW B58 and Toyota Supra applications Precision-formed for OEM-level fitment Heat-resistant construction for long-term durability Bolt-on install using factory mounting points Clean, OE-plus under-hood appearance

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Supercharger Kit Level 1 - E46 328 '99-'02

For model years 1999-2002 ~ Call in to provide vin before purchase

T#:50899197

Part#: 12-016M438

Ships in 10 Business Days

$ 9,856.00 USD

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$ 9,856.00 USD

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Add proven forced induction performance to your E46 with the Active Autowerke 328i Supercharger Kit. Engineered to work seamlessly with your factory ECU and 91 to 93 octane pump fuel, this system uses dyno developed software to precisely manage ignition timing, fueling, VANOS, and rev limits through the stock DME. The result is smooth, repeatable power delivery with OEM-like drivability and the ability to return the vehicle to stock if desired. A self contained oil cooling system keeps installation clean without interfering with the factory oil circuit. For E46 owners looking to approach M3 level performance without the full swap, this complete bolt-on solution delivers substantial gains with proven reliability. Key Features Rotrex C38-81 trim supercharger 8 PSI boost pressure CNC machined supercharger bracket with hardware Self contained oil system with front mount cooler Six higher flow fuel injectors Active Autowerke/Bosch bypass valve High temperature silicone hoses with stainless clamps Mandrel bent aluminum charge tubing Active Autowerke performance air filter (K&N on select models) Active Autowerke dyno tuned software Complete hardware and illustrated instructions 1 year warranty with tech support Performance Power: 320 BHP @ 7000 RPM Torque: 260 lb ft @ 5400 RPM Boost: 8.0 PSI

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Supercharger Kit Level 1 - E46 3330i

For model years 1999-2002 ~ Call in to provide vin before purchase

T#:50899198

Part#: 12-016M430

Ships in 10 Business Days

$ 9,856.00 USD

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$ 9,856.00 USD

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Add proven forced induction performance to your E46 330i with the Active Autowerke Supercharger Kit. Designed to deliver a significant horsepower increase without sacrificing daily usability, this system operates safely on 91 to 93 octane pump fuel and integrates directly with the factory ECU. Active Autowerke’s dyno developed calibration manages ignition timing, fueling, VANOS function, and rev limits through the stock DME for consistent, predictable results. Power delivery remains smooth and repeatable with OEM like drivability, and the system can be returned to stock configuration if needed. The included self contained oil cooling circuit keeps installation straightforward without modifying the factory oil system. For E46 owners seeking a complete, well engineered bolt on solution, this kit offers substantial, reliable gains. Key Features Rotrex C38-81 trim supercharger 8 PSI boost pressure CNC machined supercharger bracket with hardware Self contained oil system with front mount oil cooler Six higher flow fuel injectors Active Autowerke/Bosch bypass valve High temperature silicone hoses with stainless clamps Mandrel bent aluminum tubing for improved flow Active Autowerke performance air filter (K&N on select models) Active Autowerke dyno tuned software Complete mounting hardware, plumbing, hoses, and clamps Illustrated installation manual and guide 1 year warranty with technical support Performance Specifications Power: 320 BHP @ 7000 RPM Torque: 260 lb ft @ 5400 RPM Boost Level: 8.0 PSI

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Supercharger Kit Level 1 - E46 330 2003+

For model years 2003+ ~ Call in to provide vin before purchase

T#:50899201

Part#: 12-016M45

Ships in 10 Business Days

$ 9,856.00 USD

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$ 9,856.00 USD

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Add proven forced induction performance to your E46 330i with the Active Autowerke Supercharger Kit. Designed to deliver a significant horsepower increase without sacrificing daily usability, this system operates safely on 91 to 93 octane pump fuel and integrates directly with the factory ECU. Active Autowerke’s dyno developed calibration manages ignition timing, fueling, VANOS function, and rev limits through the stock DME for consistent, predictable results. Power delivery remains smooth and repeatable with OEM like drivability, and the system can be returned to stock configuration if needed. The included self contained oil cooling circuit keeps installation straightforward without modifying the factory oil system. For E46 owners seeking a complete, well engineered bolt on solution, this kit offers substantial, reliable gains. Key Features Rotrex C38-81 trim supercharger 8 PSI boost pressure CNC machined supercharger bracket with hardware Self contained oil system with front mount oil cooler Six higher flow fuel injectors Active Autowerke/Bosch bypass valve High temperature silicone hoses with stainless clamps Mandrel bent aluminum tubing for improved flow Active Autowerke performance air filter (K&N on select models) Active Autowerke dyno tuned software Complete mounting hardware, plumbing, hoses, and clamps Illustrated installation manual and guide 1 year warranty with technical support Performance Specifications Power: 320 BHP @ 7000 RPM Torque: 260 lb ft @ 5400 RPM Boost Level: 8.0 PSI

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PRIMA Supercharger Kit (Non-Intercooled) - E46 M3

For SMG Transmissions Only ~ Call in to provide vin before purchase

T#:50899202

Part#: 12-021S

Ships in 10 Business Days

$ 8,906.00 USD

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$ 8,906.00 USD

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Co-developed with Frank Smith of TuningTechFS, the Active Autowerke PRIMA Supercharger Kit delivers a proven entry point into forced induction for the E46 M3. The system is engineered around efficiency, repeatability, and upgrade potential, with a baseline configuration that can grow beyond 500 WHP through available Level 1 and Level 2 packages. PRIMA focuses on clean, practical design. This is a fully bolt-on, non intercooled setup that installs without custom fabrication and can be reverted to stock if required. The modular architecture also allows straightforward progression to higher output configurations. As expected from Active Autowerke, the kit enhances overall performance while preserving the sharp throttle response and balanced character of the S54-powered M3. PRIMA Supercharger Kit Key Features Rotrex C38-92 supercharger assembly Active Autowerke GEN 9 intake manifold plenum Active Autowerke dual blow off valve configuration Active Autowerke green performance filter with cover Alpha N calibration with SIMON 4 interface included High capacity fuel injectors Colder heat range spark plugs Dedicated self contained oil cooling circuit Pre assembled hoses, clamps, and installation hardware Compatible with Level 1 and Level 2 upgrade paths Baseline Dynojet Results Boost: 5.8 PSI Stock Power: 285.4 WHP @ 7500 RPM Stock Torque: 232.36 lb ft @ 5250 RPM Supercharged Power: 426.69 WHP @ 8150 RPM Supercharged Torque: 297.99 lb ft @ 7200 RPM

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Power Pulley DPK Belt Kit

For vehicles with production date from 6/2008

T#:50934275

Part#: 13-001D

Ships in 3 Business Days

$ 75.00 USD

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$ 75.00 USD

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Free Up Real S65 Power — Engineered the Turner Way Your S65 is already making the power. This kit simply lets you keep more of it. The Active Autowerke Power Pulley Kit for the BMW E9X M3 reduces parasitic drag at the crankshaft, trimming rotational mass and freeing up horsepower that would otherwise be consumed by accessory drive load. The result is a measurable increase in rear-wheel output without sacrificing the balance, cooling capacity, or long-term durability expected from a properly engineered BMW upgrade. The crank pulley is CNC-machined from billet 6061 aluminum and finished with a hard-coat anodize for durability under sustained high-RPM operation. Unlike undersized pulleys that compromise system function, this design maintains proper operating characteristics while delivering real-world gains. Late-2007 production E9X M3 models transitioned to a double-sided (DPK) A/C belt configuration. Rather than forcing a workaround, Active Autowerke developed a proper DPK-compatible solution — including the correct matched belt. Applicable kits also include a spare DPK belt for added insurance. Dyno testing on a Mustang chassis dyno confirms gains of 10–12+ rear-wheel horsepower on an otherwise stock vehicle. Installation is fully reversible and requires no permanent modification. Product Highlights 10–12+ RWHP gain verified on stock S65 engines Complete bolt-on system CNC-machined 6061 billet aluminum crank pulley Hard-coat anodized finish for durability Includes correct replacement drive and A/C belts Spare DPK belt included where applicable Compatible with manual and DCT-equipped E9X M3 Reduces parasitic drag and rotational mass Designed to maintain proper operating temperatures Works in conjunction with Active Autowerke performance software Available for single-sided and double-sided (DPK) belt configurations Fitment Information Confirm whether your E9X M3 is equipped with a single-sided or double-sided (DPK) A/C belt prior to ordering to ensure correct application. A properly engineered solution for enthusiasts who want measurable gains while preserving OEM-level refinement and reliability.

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E46 M3 Prima Plus + Supercharger With 600HP Upgrade Kit

For SMG Transmissions Only ~ Call in to provide vin before purchase

T#:50934251

Part#: V12-035S

Ships in 10 Business Days

$ 10,449.00 USD

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$ 10,449.00 USD

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As producer of one of the finest working supercharger systems for the BMW E46 M3, Active Autowerke is proud to introduce the PRIMA PLUS supercharger system capable of exceeding 500 WHP running on pump drawn 93 octane. The PRIMA PLUS is an upgrade kit to the existing PRIMA supercharger system designed to create MORE horsepower.

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Rotrex C38 Supercharger Kit - Level 1 (OBD2)

For OBD2 vehicles w/ Automatic Transmission Only

T#:50899186

Part#: 12-003A

Ships in 10 Business Days

$ 8,074.00 USD

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$ 8,074.00 USD

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360HP/300TQ - a complete power solution for your M3!

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Sub-Categories

Blue Thermostat Caps (pair)

BMS Oil Catch Can Oil Filler Cap Dual Vent Connection Kit - G2X/G42/A...

Blue B58 BMW Coil Upgrade Adapter Kit - N55

JB4PRO Flex Fuel Add On Harness - B58/S58

Intensity Lithium-ION Battery - i34RX - 11.5lbs

Turbo & Intake Heat Shield - Gen2 B58

Blue B58 BMW Coil Upgrade Adapter Kit - N54

Turbo & Intake Heat Shield - Gen1 B58

Supercharger Kit Level 1 - E46 328 '99-'02

Supercharger Kit Level 1 - E46 3330i

Supercharger Kit Level 1 - E46 330 2003+

PRIMA Supercharger Kit (Non-Intercooled) - E46 M3

Power Pulley DPK Belt Kit

E46 M3 Prima Plus + Supercharger With 600HP Upgrade Kit

Rotrex C38 Supercharger Kit - Level 1 (OBD2)

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