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BMW E30 M3 S14 2.3L

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BMW E30 M3 S14 2.3L Performance Engine Parts

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Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler

ES#5457435 - UVM.76MM.X1 - Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457435
Mfg#:
UVM.76MM.X1
Ships in 1 Business Day
ON SALE! SAVE 10%
$399.99

This product was last offered at the strikethrough price on
08-25-2026

$359.99 USD
Free Shipping

Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers

ES#5457424 - UVM63MMDUALOUTX2 - Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457424
Mfg#:
UVM63MMDUALOUTX2
Ships in 1 Business Day
ON SALE! SAVE 10%
$599.99

This product was last offered at the strikethrough price on
08-25-2026

$539.99 USD
Free Shipping

BMW S14B23 8.5:1 Piston Single 93.60mm

Crafted from high-strength forged materials, these pistons deliver exceptional durability under extreme pressure and high RPMs, making them perfect for both motorsport and street use. Specs: 8.5:1 Compression – 93.60 mm Bore – 1.260 in. CH, -23

Brand:
JE Piston - Corporate Logo
ES#:
4842616
Mfg#:
321357S
In Stock at Vendor
$251.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BMW S14B23 13:1 Piston Single 94.00mm

Specs: 13:1 Compression – 94.00 mm Bore – 1.260 in. CH, 3.40 CC

Brand:
JE Piston - Corporate Logo
ES#:
4842609
Mfg#:
312386S
In Stock at Vendor
$251.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BMW S14B23 8.5:1 Piston Single 94.00mm

Specs: 8.5:1 Compression – 94.00 mm Bore – 1.260 in. CH, -23.70 CC

Brand:
JE Piston - Corporate Logo
ES#:
4842623
Mfg#:
321359S
In Stock at Vendor
$251.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

BMW S14B23 13:1 Piston Single - 93.80mm

JE Piston offers high-performance, precision-engineered pistons designed to boost power and reliability in BMW S14 engines. Piston Specs: 13:1 Compression – 93.80 mm Bore – 1.260 in. CH, 3.60 CC

Brand:
JE Piston - Corporate Logo
ES#:
4842602
Mfg#:
312385S
In Stock at Vendor
$251.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

Hobbs Switch (30 psi)

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

Brand:
SnowPerformance - Corporate Logo
ES#:
2826280
Mfg#:
81081
In Stock at Vendor
$74.99 USD
Free Shipping
on orders $49 and up

Turbocharger Inlet Flange - Garrett G40/42/45 V-Band - 86mm ID

Offers a seamless transition from the turbine housing to your custom plumbing, minimizing turbulence and maximizing efficiency for high-horsepower builds. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Vargas Turbo Technologies - Corporate Logo
ES#:
5446634
Mfg#:
GARROUTT4G4045
Ships in 10 Business Days
ON SALE! SAVE 15%
$37.99

This product was last offered at the strikethrough price on
09-03-2026

$32.29 USD
Free Shipping

VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 12)

The perfect seal for repairing, replacing, or upgrading your valves and stem seals!

Brand:
Supertech - Corporate Logo
ES#:
4736131
Mfg#:
VS-VW7E-12
Ships in 8 Business Days
$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

VW-Audi 7mm Exhaust Valve stem seal / Viton (SET OF 10)

The perfect seal for repairing, replacing, or upgrading your valves and stem seals!

Brand:
Supertech - Corporate Logo
ES#:
4736130
Mfg#:
VS-VW7E-10
Ships in 8 Business Days
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CP-CARRILLO Connecting Rod Set - WMC Rod Bolts

ES#4620068 - CAR-CRS-S14-WMC - CP-CARRILLO Connecting Rod Set - WMC Rod Bolts - Significantly stronger and lighter than OE connecting rods! - CP Carrillo - BMW

Significantly stronger and lighter than OE connecting rods!

Brand:
CP Carrillo - Corporate Logo
ES#:
4620068
Mfg#:
CAR-CRS-S14-WMC
Ships on Sep 23, 2026
$1149.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Union Tee - 1/4 Quick Connect

Quick connect union T-fitting for 1/4" Nylon

Brand:
SnowPerformance - Corporate Logo
ES#:
2826282
Mfg#:
82040
Special Order: No Guaranteed ETA
$23.99 USD
Free Shipping
on orders $49 and up

Group A Pulley Kit

ES#3426698 - 12311311449KT - Group A Pulley Kit - Race-bred performance and reliability for your E30 M3! - For racing use only - Genuine BMW Motorsport - BMW

Race-bred performance and reliability for your E30 M3! - For racing use only

Brand:
Genuine BMW Motorsport - Corporate Logo
ES#:
3426698
Mfg#:
12311311449KT
Ships on Oct 8, 2026
$1696.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turner Motorsport Double Wall Slash Cut Exhaust Tips - 2.75 Inlet - 3.5 OD - Stepped Left And Stepped Right- Titanium Black Chrome

Your BMW's factory exhaust tips are fine for getting groceries, but if you've upgraded your valence or just want a rear-end aesthetic that matches your car's performance pedigree, "fine" doesn't cut it. It's time for an attitude adjustment. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481264
Mfg#:
026732TMS03KTKT
Ships on Oct 29, 2026
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$279.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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.

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Manufacturer names and/or part numbers are used only for identification purposes.

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