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Audi S4 Most Popular Parts

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RaceChip GTS Black

ES#4339047 - 904525 - RaceChip GTS Black - Get up to +41 hp and +74 lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +41 hp and +74 lb-ft through a safe and easy to use tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4339047
Mfg#:
904525
Ships on Nov 30, 2026
$749.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RaceChip S

ES#4339356 - 917360 - RaceChip S - Get up to +44 hp and +34 lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +44 hp and +34 lb-ft through a safe and easy to use tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4339356
Mfg#:
917360
Ships on Nov 30, 2026
$349.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RaceChip RS

ES#4339046 - 904521 - RaceChip RS - Get up to +34 hp and +59 through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +34 hp and +59 through a safe and easy to use tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4339046
Mfg#:
904521
Ships on Nov 30, 2026
$449.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RaceChip S

ES#4339045 - 904520 - RaceChip S - Get up to +27 hp and +44 lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +27 hp and +44 lb-ft through a safe and easy to use tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4339045
Mfg#:
904520
Ships on Nov 30, 2026
$349.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 Carbon Intake System

ES#4039962 - VWR1241S4 - Audi B9 S4/S5 Carbon Intake System - The highest-performing, race-bred cold-air induction system for the current B9 Audi S4 & S5! - Racingline - Audi

The highest-performing, race-bred cold-air induction system for the current B9 Audi S4 & S5!

Brand:
Racingline - Corporate Logo
ES#:
4039962
Mfg#:
VWR1241S4
Ships on Nov 30, 2026
$1340.99 USD

CONTROL ARM BUSHING

ES#4151659 - 4D0407181H - CONTROL ARM BUSHING - Rein - Audi Volkswagen

2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4151659
Mfg#:
4D0407181H
Ships in 3 Business Days
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87C

ES#4810572 - 078121113F - Thermostat - 87C - Prevent overheating and premature engine wear - Rein - Audi Volkswagen

Prevent overheating and premature engine wear 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4810572
Mfg#:
078121113F
Ships in 3 Business Days
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

OIL PRESSURE SWITCH

ES#2802466 - 56919081 - OIL PRESSURE SWITCH - Rein - Audi Volkswagen

2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802466
Mfg#:
56919081
Ships in 3 Business Days
$13.99

This product was last offered at the strikethrough price on
10-22-2026

$5.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Lower Control Arm - Curved - Right

ES#4151844 - 8K0407694AD - Front Lower Control Arm - Curved - Right - Keep your suspension in top shape - Rein - Audi

Keep your suspension in top shape 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
From production date 6/21/2011

Brand:
Rein - Corporate Logo
ES#:
4151844
Mfg#:
8K0407694AD
Ships in 3 Business Days
$193.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Steering Rack Boot - Priced Each

ES#5346951 - BKP0019R - Steering Rack Boot - Priced Each - Just the boot - Rein - Audi Volkswagen

Just the boot 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5346951
Mfg#:
BKP0019R
Ships in 3 Business Days
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Transmission Oil Pan - With Gasket

ES#5346956 - ESK0133 - Transmission Oil Pan - With Gasket - Replaced your cracked or leaking transmission pan - Rein - Audi Volkswagen Porsche

Replaced your cracked or leaking transmission pan 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5346956
Mfg#:
ESK0133
Ships in 3 Business Days
$52.99 USD
Free Shipping
on orders $49 and up

Rear Shock Bump Stop - Priced Each

ES#6161 - 3B0512131H - Rear Shock Bump Stop - Priced Each - Fits left and right side - Rein - Audi Volkswagen

Fits left and right side 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
6161
Mfg#:
3B0512131H
Ships in 3 Business Days
$20.92

This product was last offered at the strikethrough price on
10-18-2026

$11.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Strut Bump Stop - Priced Each

ES#2801919 - 8D0412131E - Front Strut Bump Stop - Priced Each - Fits the left and right side - Rein - Audi Volkswagen

Fits the left and right side 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2801919
Mfg#:
8D0412131E
Ships in 3 Business Days
$6.99 USD
Free Shipping
on orders $49 and up

Front Sway Bar End Link - Left

ES#2801890 - 8D0411317D - Front Sway Bar End Link - Left - Does not include securing hardware - Rein - Audi Volkswagen

Does not include securing hardware 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2801890
Mfg#:
8D0411317D
Ships in 3 Business Days
$43.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#4220573 - 075121113D - Thermostat - 80C - Does not include sealing O-Ring - Rein - Audi Volkswagen

Does not include sealing O-Ring 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Lower temperature thermostat, stock is 87°C

Brand:
Rein - Corporate Logo
ES#:
4220573
Mfg#:
075121113D
Ships in 3 Business Days
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Upper Control Arm - Straight - Right

ES#2801446 - 8E0407506A - Front Upper Control Arm - Straight - Right - Keep your suspension steady - Rein - Audi Volkswagen

Keep your suspension steady 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2801446
Mfg#:
8E0407506A
Ships in 3 Business Days
$91.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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