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Audi S4 Stage 4 Brake Kits

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ECS "Stage 4" Front Big Brake Kit - B5/B6/B7/C5

ES#1896 - B5S4S4BBKRXS - ECS "Stage 4" Front Big Brake Kit - B5/B6/B7/C5 - Enhance braking performance with this plug-and-play upgrade! Featuring massive 6-piston calipers, lightweight 2-piece brake rotors, and all components needed for installation. - ECS - Audi

Enhance braking performance with this plug-and-play upgrade! Featuring massive 6-piston calipers, lightweight 2-piece brake rotors, and all components needed for installation. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
1896
Mfg#:
B5S4S4BBKRXS
In Stock
ON SALE!
$1999.99

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

$1899.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34)

ES#2785042 - 003883ECS02KT - Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34) - Featuring Black RS5 8-piston calipers, ECS stainless steel lines & Hawk HPS pads - ECS - Audi

Featuring Black RS5 8-piston calipers, ECS stainless steel lines & Hawk HPS pads affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please download the installation template to confirm this brake kit will fit behind your factory or after

Brand:
ECS - Corporate Logo
ES#:
2785042
Mfg#:
003883ECS02KT
Ships on Oct 16, 2026
$4328.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Front Cross-Drilled & Slotted 2-Piece Brake Rotors - Pair (380x34)

ES#2804479 - 003883ECS01A01KT - Front Cross-Drilled & Slotted 2-Piece Brake Rotors - Pair (380x34) - Replacement set for 380mm Stage 3-4 Big Brake Kits with Audi RS calipers - ECS - Audi

Replacement set for 380mm Stage 3-4 Big Brake Kits with Audi RS calipers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
*Replacement rotor set for customers that have our Stage 3/4 380mm kits with Audi RS Calipers*

Brand:
ECS - Corporate Logo
ES#:
2804479
Mfg#:
003883ECS01A01KT
In Stock
ON SALE!
$1205.99

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

$1168.94 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34)

ES#3183941 - 003883ecs01KT3 - Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34) - Featuring ECS 380mm 2-piece rotors, ECS Stainless lines, and caliper brackets - Excludes calipers - ECS - Audi

Featuring ECS 380mm 2-piece rotors, ECS Stainless lines, and caliper brackets - Excludes calipers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For customers that already sourced their own 8-piston RS5 calipers

Brand:
ECS - Corporate Logo
ES#:
3183941
Mfg#:
003883ECS01KT3
Ships on Oct 16, 2026
ON SALE!
$1779.99

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

$1726.59 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Front Big Brake Upgrade Kit - Stage 4 - 2-Piece Rotors (380x34)

ES#3221135 - 003883ecs01ktKT4 - Front Big Brake Upgrade Kit - Stage 4 - 2-Piece Rotors (380x34) - Everything necessary to upgrade your stage-3 RS caliper 365mm kit to the stage-4 380mm kit. - ECS - Audi

Everything necessary to upgrade your stage-3 RS caliper 365mm kit to the stage-4 380mm kit. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For customers with existing 365mm ECS Stage 3 Brake Kit with Audi RS5 Calipers

Brand:
ECS - Corporate Logo
ES#:
3221135
Mfg#:
003883ECS01KTKT4
Ships on Oct 16, 2026
ON SALE!
$1643.99

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

$1594.67 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Cross Drilled & Slotted 2-Piece Brake Rotors - Pair (380x38)

ES#2825795 - 003755ecs01a1KT - Front Cross Drilled & Slotted 2-Piece Brake Rotors - Pair (380x38) - Replacement rotors for Stage 4 Big Brake Kit (ES2825794 & ES3221498) - ECS - Audi

Replacement rotors for Stage 4 Big Brake Kit (ES2825794 & ES3221498) affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
*Replacement rotor set for customers that have our Stage 3/4 380mm kits with Porsche 19Z calipers*

Brand:
ECS - Corporate Logo
ES#:
2825795
Mfg#:
003755ECS01A1KT
In Stock
ON SALE!
$1356.99

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

$1315.81 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Big Brake Kit - Stage 4 - 2-Piece Cross Drilled & Slotted Rotors (352x32)

ES#3082393 - B5S4S4BBKRXSKT - Front Big Brake Kit - Stage 4 - 2-Piece Cross Drilled & Slotted Rotors (352x32) - For customers with existing 18z calipers, brake pads, & fluid - ECS - Audi

For customers with existing 18z calipers, brake pads, & fluid affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Does not include calipers, brake pads, or brake fluid

Brand:
ECS - Corporate Logo
ES#:
3082393
Mfg#:
B5S4S4BBKRXSKT
In Stock at Vendor
ON SALE! SAVE 20%
$1279.99

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

$1023.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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