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BMW E34 525i M50 2.5L

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BMW E34 525i M50 2.5L Performance Engine Internals

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Complete Cylinder Head Basic Replacement Kit (Dry)

10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4766708
Mfg#:
11121703637-DKT
Back Ordered
$2834.46

This product was last offered at the strikethrough price on
04-06-2026

$2722.44 USD
This product is lifetime replacement eligible Partial Replacement

M52 / S52 Cylinder Head - Complete

ES#2918694 - 11121703637-1 - M52 / S52 Cylinder Head - Complete - Complete cylinder head with guides, seats, valves, & springs - AMC - BMW
ECS Tuning recommends this product.

Complete cylinder head with guides, seats, valves, & springs

Brand:
AMC - Corporate Logo
ES#:
2918694
Mfg#:
11121703637-1
Ships on Oct 12, 2026
$2315.99 USD
Free Shipping

Drilled Oil Pump Nut

ES#3023516 - OILPUMPNUT - Drilled Oil Pump Nut - Safety-wired nut to alleviate the nut backing off, leaving you with no oil pressure - Turner Motorsport - BMW

Safety-wired nut to alleviate the nut backing off, leaving you with no oil pressure 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Turner Motorsport - Corporate Logo
ES#:
3023516
Mfg#:
OILPUMPNUT
Ships in 1-2 days
ON SALE! SAVE 15%
$30.99

This product was last offered at the strikethrough price on
06-13-2026

$26.34 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

King Performance BMW Rod Bearings - Std.

ES#4757010 - CR6640SM - King Performance BMW Rod Bearings - Std. - King Rod Bearings Std. Size - King - BMW

King Rod Bearings Std. Size

Brand:
King - Corporate Logo
ES#:
4757010
Mfg#:
CR6640SM
In Stock
13% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$207.99

This product was last offered at the strikethrough price on
09-12-2026

$179.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Complete Cylinder Head Ultimate Replacement Kit

ES#2918774 - 11121703637-2KT - Complete Cylinder Head Ultimate Replacement Kit - Everything you will need to do a head service on your BMW, plus a new thermostat, thermostat housing, a magnetic drain plug, a camshaft position sensor, spark plugs, and ignition coils - Assembled By ECS - BMW

Everything you will need to do a head service on your BMW, plus a new thermostat, thermostat housing, a magnetic drain plug, a camshaft position sensor, spark plugs, and ignition coils 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2918774
Mfg#:
11121703637-2KT
Back Ordered
ON SALE!
$3910.92

This product was last offered at the strikethrough price on
04-06-2026

$3808.53 USD
This product is lifetime replacement eligible Partial Replacement

WPC-Treated Race Series Rod Bearing Set - M20/M50/M52/M54/S50/S52

ES#4845637 - M5X-WPC-RB - WPC-Treated Race Series Rod Bearing Set - M20/M50/M52/M54/S50/S52 - The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. - Turner Motorsport - BMW

The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Turner Motorsport - Corporate Logo
ES#:
4845637
Mfg#:
M5X-WPC-RB
In Stock
ON SALE! SAVE 25%
$475.99

This product was last offered at the strikethrough price on
06-13-2026

$356.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Camshaft Alignment Tool Set

ES#2778117 - 003304SCH01A - Camshaft Alignment Tool Set - Locks your Camshaft in place, making performing VANOS or cylinder head work more convenient - Schwaben - BMW
ECS Tuning recommends this product.

Locks your Camshaft in place, making performing VANOS or cylinder head work more convenient 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Schwaben - Corporate Logo
ES#:
2778117
Mfg#:
003304SCH01A
In Stock
ON SALE! SAVE 10%
$112.99

This product was last offered at the strikethrough price on
05-02-2026

$101.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Complete Cylinder Head Basic Replacement Kit

ES#2918768 - 11121703637-1KT - Complete Cylinder Head Basic Replacement Kit - Everything you will need to do a head service on your BMW - Assembled By ECS - BMW

Everything you will need to do a head service on your BMW 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2918768
Mfg#:
11121703637-1KT
Back Ordered
ON SALE!
$2874.58

This product was last offered at the strikethrough price on
04-06-2026

$2783.19 USD
This product is lifetime replacement eligible Partial Replacement

Performance Main Bearing Set

ES#4364525 - MB7039XP - Performance Main Bearing Set - Performance engine bearing kit - King - BMW

Performance engine bearing kit

Brand:
King - Corporate Logo
ES#:
4364525
Mfg#:
MB7039XP
Back Ordered
13% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$236.99

This product was last offered at the strikethrough price on
07-08-2026

$205.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Wiseco BMW Turbo 84.50MM Bore +0.50 Oversized 8.8:1 CR Pistons

ES#3149279 - wisKE115M845 - Wiseco BMW Turbo 84.50MM Bore +0.50 Oversized 8.8:1 CR Pistons - Wiseco 6 piece forged piston set - Wiseco - BMW

Wiseco 6 piece forged piston set

Brand:
Wiseco - Corporate Logo
ES#:
3149279
Mfg#:
WISKE115M845
In Stock
Limited Qty Sale
$1157.99

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

$1062.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

SCHRICK CAMSHAFT SET, BMW M50/M52/S50/S52 276/270

ES#4447289 - SCH-CSS-S52-276/ - SCHRICK CAMSHAFT SET, BMW M50/M52/S50/S52 276/270 - A more aggressive option for street use and an upgrade from stock Recommended to Use With Vanos Limiters and Upgraded Valve Springs - VAC Motorsports - BMW

A more aggressive option for street use and an upgrade from stock Recommended to Use With Vanos Limiters and Upgraded Valve Springs

Brand:
VAC Motorsports - Corporate Logo
ES#:
4447289
Mfg#:
SCH-CSS-S52-276/
Ships in 2 Business Days
$2640.99

This product was last offered at the strikethrough price on
09-10-2026

$1779.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

WPC-Treated Race Series Main Bearing Set - M20/M50/M52/M54/S54

ES#4845662 - M5X-WPC-MB - WPC-Treated Race Series Main Bearing Set - M20/M50/M52/M54/S54 - The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. - Turner Motorsport - BMW

The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Turner Motorsport - Corporate Logo
ES#:
4845662
Mfg#:
M5X-WPC-MB
In Stock
ON SALE! SAVE 18%
$520.99

This product was last offered at the strikethrough price on
06-13-2026

$425.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

6mm Single Groove Valve Keeper - Priced Each

ES#2598482 - KPR-6S-7 - 6mm Single Groove Valve Keeper - Priced Each - Two required per valve, necessary for use with certain supertech valves - Supertech - BMW

Two required per valve, necessary for use with certain supertech valves

Brand:
Supertech - Corporate Logo
ES#:
2598482
Mfg#:
KPR-6S-7
In Stock
$3.99

This product was last offered at the strikethrough price on
04-13-2026

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head - Bare

ES#2918693 - 11121703637 - Cylinder Head - Bare - Bare head with guides and seats only - AMC - BMW

Bare head with guides and seats only

Brand:
AMC - Corporate Logo
ES#:
2918693
Mfg#:
11121703637
Special Order: No Guaranteed ETA
$1631.99 USD
Free Shipping

More About Performance Engine Internals

Building your dream engine? We have all the bearings, pistons, connecting rods, timing components, and more to help make that dream a reality.

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