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BMW Internal Engine Parts

Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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OEM Head Bolt Set - M50 M52 S50 S52
OEM Head Bolt Set - M50 M52 S50 S52
Victor Reinz - Corporate Logo
T#:1551
Part#: 11121721938
In Stock
Sale - Save 66% $ 62.21

This product was last offered at the strikethrough price on
05-14-2026

$ 20.94 USD
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Sale - Save 66%
$ 62.21

This product was last offered at the strikethrough price on
05-14-2026

$ 20.94 USD
Free Shipping on orders $49 and up
Add to Wish List
Head Bolt Set for all M50 engines with a steel engine block.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.​

This item fits the following BMWs:
992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1991-1995 E34 BMW 525i
1997-1998 E39 BMW 528i
1998-2000 Z3 BMW M Roadster M Roadster
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SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - BMW M50 M52 M54 S52
SuperTech Dual Valve Spring Upgrade Kit w/ Steel Retainers - 67lbs - ...
Supertech - Corporate Logo
T#:51426477
Part#: SPRKH100DRBMST
In Stock at Vendor
New Item
$ 833.99 USD
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$ 833.99 USD
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Crafted from premium Superclean Chrome Silicon Vanadium Steel alloy, these valve springs offer exceptional performance and durability even at high RPMs. CAD engineering ensures that the wire stress levels remain within defined limits for long-lasting durability, even under extreme racing conditions. Advanced computer software allows Supertech to meticulously control harmonics, ensuring optimal performance. Manufactured with high-quality military-certified Steel, the retainers are CNC machined to provide a precise fit, guaranteeing longevity and reliability.
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Titanium Retainers - Set Of 8 - BMW B48 - Intake Side
Titanium Retainers - Set Of 8 - BMW B48 - Intake Side
Supertech - Corporate Logo
T#:54388410
Part#: RET-BMB48-TI-8
Ships in 8 Business Days
New Item
$ 145.99 USD
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$ 145.99 USD
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By minimizing moving weight, these retainers help prevent valve float at extended RPM ranges, ensuring your engine maintains precise timing and peak power delivery under the most demanding track conditions.
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Supertech Intake Valve - Set Of 8 - Head 32.0mm (+1.8)
Supertech Intake Valve - Set Of 8 - Head 32.0mm (+1.8)
Supertech - Corporate Logo
T#:54388512
Part#: MCIVN-1008T-8
Ships in 8 Business Days
New Item
$ 225.99 USD
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$ 225.99 USD
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Supertech Performance brings decades of racing experience to their valvetrain components. By utilizing state-of-the-art manufacturing processes and rigorous testing, these valves provide the perfect balance of lightweight design, high-flow geometry, and bulletproof durability needed for forced induction, nitrous, or high-revving naturally aspirated builds.
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Supertech Forged I-Beam Connecting Rod Kit - BMW B58 3.0L
Supertech Forged I-Beam Connecting Rod Kit - BMW B58 3.0L
Supertech - Corporate Logo
T#:57086686
Part#: CRBMB58-I148.3-6
Ships in 8 Business Days
New Item
$ 1,864.99 USD
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$ 1,864.99 USD
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Supertech connecting rods for BMW B58B30 applications are designed for racing reliability and high-RPM use, rated for up to 1600 hp. Forged and machined from premium high-strength alloy with ARP fasteners included.
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5mm Single groove valve lock conversion (SET OF 16)
5mm Single groove valve lock conversion (SET OF 16)
Supertech - Corporate Logo
T#:51356057
Part#: KPR-5.0-7S-16
Ships on Sep 4, 2026
New Item
$ 60.99 USD
Free Shipping on orders $49 and up
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$ 60.99 USD
Free Shipping on orders $49 and up
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