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BMW M3 Performance Engine Parts

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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

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 13, 2026
$2584.99 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 13, 2026
$945.00 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 13, 2026
$409.00 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 13, 2026
$1214.00 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 13, 2026
$3596.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Milltek Center Section with Hi-Flow Sport Cats - E9X M3

Motorsport pedigree. Superior quality. Excellent sound. Milltek Sport Hi-Flow catted downpipes for enhanced performance.

Brand:
Milltek Sport - Corporate Logo
ES#:
4061564
Mfg#:
SSXBM1038
Ships on Nov 13, 2026
$3048.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

PFS S58 Port Injection Kit - 550cc

Add port injections with out the need for intake spacers with this plug and play kit

Brand:
PFS
ES#:
4419831
Mfg#:
PFS-S58-PI-550
Ships in 10 Business Days
$1109.99 USD
Free Shipping

PFS S58 Port Injection Kit - 900cc

Add port injections with out the need for intake spacers with this plug and play kit

Brand:
PFS
ES#:
4419832
Mfg#:
PFS-S58-PI-900
Ships in 10 Business Days
$1439.99 USD
Free Shipping

Hobbs Switch (30 psi)

Engages water-methanol system at 35PSI Adjustable from 25-50psi

Brand:
SnowPerformance - Corporate Logo
ES#:
2826280
Mfg#:
81081
Ships in 2 Business Days
$74.99 USD
Free Shipping
on orders $49 and up

More About Performance Engine Parts

Our name says it all. That's why ECS Tuning is dedicated to providing our customers with the broadest possible assortment of engine tuning options at a range of prices and options to fit any budget. Start small and grow your car into something special with performance engine upgrades from a company that has tuning in its name and its blood.

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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