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BMW E39 525i M54 2.5L

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BMW E39 525i M54 2.5L Performance Parts & Upgrades

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Wheel Spacer Kit - 15mm

ES#11312 - ECS#264KT - Wheel Spacer Kit - 15mm - Aluminum wheel spacer kit made specifically for your 5x120, 74.1mm center bore BMW. - ECS - BMW

Aluminum wheel spacer kit made specifically for your 5x120, 74.1mm center bore BMW. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Recommend 12x1.5x43mm conical bolts in addition to these ECS spacers

Brand:
ECS - Corporate Logo
ES#:
11312
Mfg#:
ECS#264KT
In Stock
ON SALE! SAVE 25%
$125.99

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

$94.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW Coilover Kit - Variant 1 (V1)

ES#3032507 - 10220008 - KW Coilover Kit - Variant 1 (V1) - Variant 1 coilovers offer the best balance between sporty driving and comfort - KW Suspension - BMW

Variant 1 coilovers offer the best balance between sporty driving and comfort affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Sedan Models Only

Brand:
KW Suspension - Corporate Logo
ES#:
3032507
Mfg#:
10220008
Back Ordered
$2244.00 USD
Free Shipping
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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
2598482
Mfg#:
KPR-6S-7
In Stock
$5.99

This product was last offered at the strikethrough price on
03-04-2026

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

Rear M5/M-Tech Bumper Conversion

ES#2678641 - E39M5RRBUMP - Rear M5/M-Tech Bumper Conversion - M5 looks without the M5 cost - ECS - BMW

M5 looks without the M5 cost affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For sedans only without PDC

Brand:
ECS - Corporate Logo
ES#:
2678641
Mfg#:
E39M5RRBUMP
Back Ordered
Auto Notify
ON SALE!
$758.99

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

$736.22 USD
This product is lifetime replacement eligible Lifetime Replacement

KW V1 Series Coilover Kit - Touring Models With Rear Air Suspension

ES#2091985 - 10220036 - KW V1 Series Coilover Kit - Touring Models With Rear Air Suspension - Variant 1 coilovers offer the best balance between sporty driving and comfort - KW Suspension - BMW

Variant 1 coilovers offer the best balance between sporty driving and comfort affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
KW Suspension - Corporate Logo
ES#:
2091985
Mfg#:
10220036
Ships in 5 Business Days
$2144.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear EP24 "Enthusiast Performance" Brake Pad Set

ES#4739108 - EP24-692 - Rear EP24 "Enthusiast Performance" Brake Pad Set - This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. - ECS - BMW

This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4739108
Mfg#:
EP24-692
In Stock
ON SALE! SAVE 20%
$110.99

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

$88.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Strut Tower Brace

ES#4145131 - D180-0391 - Rear Strut Tower Brace - Preserves chassis integrity & improves handling - a high-end accessory for the discerning enthusiast - Dinan - BMW

Preserves chassis integrity & improves handling - a high-end accessory for the discerning enthusiast Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
For sedan models only

Brand:
Dinan - Corporate Logo
ES#:
4145131
Mfg#:
D180-0391
Ships on Jul 27, 2026
11% off MSRP

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

$479.99

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

$425.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Proton Plus Series Nitrous System

ES#4044087 - NEX20421 - Proton Plus Series Nitrous System - Choose your bottle size to add up to 150hp with this EFI nitrous kit. - Nitrous Express - BMW

Choose your bottle size to add up to 150hp with this EFI nitrous kit. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Nitrous Express - Corporate Logo
ES#:
4044087
Mfg#:
NEX20421
In Stock
Starting at $527.99 USD
Customize
Free Shipping
on orders $49 and up

Rear M5/M-Tech Bumper Conversion

ES#2636228 - E39WGNMTECHRR - Rear M5/M-Tech Bumper Conversion - M-Tech looks without the M-Tech cost - ECS - BMW

M-Tech looks without the M-Tech cost affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For touring models only
For touring models only

Brand:
ECS - Corporate Logo
ES#:
2636228
Mfg#:
E39WGNMTECHRR
Back Ordered
$701.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 20mm

ES#240409 - ecs#265wb - Wheel Spacer & Bolt Kit - 20mm - Aluminum wheel spacer and extended bolt kit made specifically for your 5x120, 74.1mm center bore BMW. - ECS - BMW

Aluminum wheel spacer and extended bolt kit made specifically for your 5x120, 74.1mm center bore BMW. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
240409
Mfg#:
ECS#265WB
In Stock
ON SALE!
$164.99

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

$160.04 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Stud Conversion Kit - full set

ES#2807082 - PRACH5KT2 - Wheel Stud Conversion Kit - full set - Make wheel changes faster and easier, enough to convert both axles - ECS - BMW

Make wheel changes faster and easier, enough to convert both axles affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Ideal for vehicles with up to 20mm wheel spacers. May also be used with smaller spacers or without spacer

Brand:
ECS - Corporate Logo
ES#:
2807082
Mfg#:
PRACH5KT2
In Stock
ON SALE! SAVE 10%
$191.99

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

$172.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Spec D LED Halo Projector Headlights - Matte Black Housing/Clear Lens - E39

ES#3021233 - 2LHPE3997JMTM - Spec D LED Halo Projector Headlights - Matte Black Housing/Clear Lens - E39 - Standard Turn Signals, Matte Black Housing, Clear Lens - Spec-D Tuning - BMW

Standard Turn Signals, Matte Black Housing, Clear Lens affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles without OEM Xenon Headlights

Brand:
Spec-D Tuning - Corporate Logo
ES#:
3021233
Mfg#:
2LHPE3997JMTM
In Stock
$273.99

This product was last offered at the strikethrough price on
02-09-2026

$258.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS 6-Piston Front Big Brake Kit (338x26)

ES#2598719 - 000249ECS01KT - ECS 6-Piston Front Big Brake Kit (338x26) - Give your BMW incredible stopping power! - Assembled By ECS - BMW

Give your BMW incredible stopping power! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Requires the use of 17" or larger wheels

Brand:
Assembled By ECS - Corporate Logo
ES#:
2598719
Mfg#:
000249ECS01KT
Ships in 7 Business Days
$2039.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Ignition Service Kit

ES#2597316 - 12131712219KT1 - Ignition Service Kit - Everything you need to service your ignition system including Bosch ignition coils and Bosch Platinum+4 spark plugs - Assembled By ECS - BMW

Everything you need to service your ignition system including Bosch ignition coils and Bosch Platinum+4 spark plugs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with production date from 09/2002

Brand:
Assembled By ECS - Corporate Logo
ES#:
2597316
Mfg#:
12131712219KT1
In Stock
$253.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Clutch & Flywheel Kit & Polyurethane Transmission Mount Set

ES#4876683 - 048498LA01EBKT - Performance Clutch & Flywheel Kit & Polyurethane Transmission Mount Set - Receive a discounted performance polyurethane transmission mount set alongside your new performance clutch and flywheel kit! - Enthusiast Bundles - BMW

Receive a discounted performance polyurethane transmission mount set alongside your new performance clutch and flywheel kit! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876683
Mfg#:
048498LA01EBKT
In Stock
ON SALE! SAVE 19%
$1236.99

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

$999.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

All the performance upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.

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