BMW Internal Engine Parts for BMW 4 Series G26 (2022+)

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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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High Performance Valve Spring Kit - B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Kelford Cams - Corporate Logo
T#:25938619
Part#: KEL-HPVSK-B58
Ships in 3 Business Days
$ 699.99 USD
Free Shipping on orders $49 and up
Kelford's performance valve spring and titanium retainer kit is designed to work with the B58B30 straight-6 engine. Made using high-performance PACALOY™, this kit is sure to offer outstanding performance. This kit is specifically engineered to work well with their Stage 1, Stage 2, and Stage 3 camshafts to provide exceptional quality, reliability, and performance. 90lb seat pressure at 36.5 mm installed height; 193lb at 11.0 mm valve lift Spring coil bind height at 23.6 mm
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WPC-Treated Performance Rod Bearing Installation Kit - B46 / B48 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:36066270
Part#: B48-WPC-RBKT2
In Stock
Sale - Save 25% $ 551.99

This product was last offered at the strikethrough price on
05-03-2026

$ 413.62 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 551.99

This product was last offered at the strikethrough price on
05-03-2026

$ 413.62 USD
Free Shipping on orders $49 and up

If your engine has higher mileage, don't neglect rod bearing replacement! These bearings are sandwiched between the connecting rod and crankshaft journal and are prone to failure due to overheating, lack of lubrication, or general wear. Replace your rod bearings and prevent a spun bearing.

Starting with ACL’s high-performance bearing shells, our Race Series bearings are built to withstand extreme RPMs and stress. Utilizing a "Duraglide" tri-metal construction and a high-strength overlay plate, these bearings offer superior oiling and heat resistance for high-RPM operation.

Our WPC-treated bearings take ACL’s already impressive design and enhance it even further. The WPC treatment process strengthens and smooths the bearing surface by firing high-speed, ultra-fine particles at the bearing shells, reducing friction and improving durability. This advanced surface treatment ensures smoother operation and improved heat dissipation, which are critical for any high-performance engine.

Kit includes:

Turner Motorsport WPC-Treated Race Series Rod Bearing Shells (8) Genuine BMW Connecting Rod Bolts (8) Assembly Lube (4 oz.)

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Kelford Camshaft Set - Gen 2 B58
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Kelford Cams - Corporate Logo
T#:25938642
Part#: KEL-B58-GEN2
Ships in 3 Business Days
Starting at $ 2,394.98 USD
Starting at $ 2,394.98 USD
BMW B58 Gen2 - Stage 1 Street | Strip | Circuit Race | Road Race | Roll Race | Drift | E85 270° / 268° - 10.30mm / 10.15mm Valve Lift 270°/268° cams to suit BMW's Gen 2 B58 engine with bolt-on intake, exhaust, and turbo upgrades. For an engine producing around 550-750hp running a 58-68mm turbo. Still maintains full use of Valvetronic and Double VANOS for good throttle response and wide power band. Must have valve spring upgrade. BMW B58 Gen2 - Stage 2 Strip | Drag Race | Circuit Race | Road Race | Roll Race | Drift | E85 285° / 280° - 10.30mm / 10.60mm Valve Lift 285°/280° stage 2 racing cams for professionally built BMW Gen 2 B58 engine making 750hp-1000hp. Turbo sizing 62-72mm. Great with aftermarket intake plenums. Still can maintain full use of Valvetronic and Dual VANOS. Can run Valvetronic locked in the fully open position when using an aftermarket throttle body. Must have valve spring upgrade. BMW B58 Gen2 - Stage 3 Strip | Drag Race | Roll Race | Drift | E85 | Methanol 288° / 288° - 10.35mm / 10.80mm Valve Lift 288° Stage 3 drag racing cams for professionally built B58 Gen 2 engines making 1200hp+. Turbo sizing 72mm+ on high boost. Fuel-type ethanol blend or methanol. Must use aftermarket high-flow plenum with a throttle body conversion. Recommend locking the Valvetronic system at 100% swing. Must have valve spring upgrade. High Performance Valve Spring Kit - B58 Kelford's performance valve spring and titanium retainer kit is designed to work with the B58B30 straight-6 engine. Made using high-performance PACALOY™, this kit is sure to offer outstanding performance. This kit is specifically engineered to work well with their Stage 1, Stage 2, and Stage 3 camshafts to provide exceptional quality, reliability, and performance. 90lb seat pressure at 36.5 mm installed height; 193lb at 11.0 mm valve lift Spring coil bind height at 23.6 mm
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