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BMW M3 Engine Parts & Accessories

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BMW S14B23 8.5:1 Piston Single - 94.20mm

Specs: 8.5:1 Compression – 94.20 mm Bore – 1.260 in. CH, -24.00 CC

Brand:
JE Piston - Corporate Logo
ES#:
4842628
Mfg#:
321360S
In Stock at Vendor
$251.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

S58 Valve Spring Kit

High Performance Valve Springs

Brand:
Kelford Cams - Corporate Logo
ES#:
5526748
Mfg#:
KEL-KVS58-BT
Ships in 3 Business Days
$599.99 USD

MMX Power Control Module

Increase power with this plug-and-play tuning module! Gains of up to +60 HP & +70 Nm (+52 ft lbs) For CS models only

Brand:
MMX Performance - Corporate Logo
ES#:
4865791
Mfg#:
MMR50-1607
Ships in 3 Business Days
$1013.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

MMX Power Control Module

Increase power with this plug-and-play tuning module! Gains of up to +70 HP & +110Nm (+81 ft lbs) For Competition package only

Brand:
MMX Performance - Corporate Logo
ES#:
4865790
Mfg#:
MMR50-1605
Ships in 3 Business Days
$1013.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Crankshaft Seal

Keep your vehicle performing at its absolute peak with this premium crankshaft seal from Meistersatz.

Brand:
Meistersatz - Corporate Logo
ES#:
5506946
Mfg#:
11118618864
Ships in 3 Business Days
$43.99 USD
Free Shipping
on orders $49 and up

Valve Cover Gasket Set

Restore your engine's internal sealing and keep oil where it belongs with this premium replacement set from Meistersatz.

Brand:
Meistersatz - Corporate Logo
ES#:
5506939
Mfg#:
11127832034
Ships in 3 Business Days
$162.99 USD
Free Shipping
on orders $49 and up

Engine Oil Cooler Gasket

Seal up those pesky oil leaks and restore proper engine sealing with this high-quality oil filter housing gasket from Meistersatz.

Brand:
Meistersatz - Corporate Logo
ES#:
5506957
Mfg#:
11428637821G
Ships in 3 Business Days
$12.99 USD
Free Shipping
on orders $49 and up

Hi-Flow Sports Catted Downpipes

Motorsport pedigree. Superior quality. Excellent sound. Milltek Sport Hi-Flow catted downpipes for enhanced performance. Requires Milltek Catback Exhaust
For Vehicles Produced after 12/18

Brand:
Milltek Sport - Corporate Logo
ES#:
4061574
Mfg#:
SSXBM1127
Ships on Nov 20, 2026
ON SALE! SAVE 10%
$2584.99

This product was last offered at the strikethrough price on
10-26-2026

$2325.65 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

OPF Bypass Kit - Non-Resonated

Free up your restrictive OPF/GPF system For Vehicles With OPF (2020+)

Brand:
Milltek Sport - Corporate Logo
ES#:
4447555
Mfg#:
SSXBM1194
Ships on Nov 20, 2026
ON SALE! SAVE 10%
$945.00

This product was last offered at the strikethrough price on
10-26-2026

$850.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

OPF Bypass Module

For Cars with OPF/GPF Bypass Pipes For Vehicles With Milltek OPF Bypass Components Installed (2020+)

Brand:
Milltek Sport - Corporate Logo
ES#:
4447557
Mfg#:
SSXBM1192
Ships on Nov 20, 2026
ON SALE! SAVE 10%
$409.00

This product was last offered at the strikethrough price on
10-26-2026

$368.10 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

OPF Bypass Kit - Resonated

Free up your restrictive OPF/GPF system For Vehicles With OPF (2020+)

Brand:
Milltek Sport - Corporate Logo
ES#:
4447556
Mfg#:
SSXBM1193
Ships on Nov 20, 2026
ON SALE! SAVE 10%
$1214.00

This product was last offered at the strikethrough price on
10-26-2026

$1092.60 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Large Bore Downpipes And Hi-Flow Sports Cats

Motorsport pedigree. Superior quality. Excellent sound. Milltek Sport Hi-Flow catted downpipes for enhanced performance. For Vehicles Produced before 01/19

Brand:
Milltek Sport - Corporate Logo
ES#:
3569876
Mfg#:
SSXBM1030
Ships on Nov 20, 2026
ON SALE! SAVE 10%
$3596.99

This product was last offered at the strikethrough price on
10-26-2026

$3236.64 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

Let us help you find the parts that fit your BMW

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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