{"product_id":"audi-a4-s4-rs4-b7-akebono-9n-400mm-ccb-kit","title":"2005-2008 Audi A4 \/ S4 \/ RS4 (B7) CCB Big Brake Kit | Akebono 9N 6-Piston","description":"\u003cdiv class=\"sfx\"\u003e\n\u003csection class=\"box red\"\u003e\u003ch2\u003e2005-2008 Audi A4 \/ S4 \/ RS4 (B7) CCB Big Brake Kit — Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup\u003c\/h2\u003e\n\u003cp\u003eB7 A4, S4, and RS4 owners shop this kit when repeated high-speed braking, mountain driving, or track use has exposed iron-rotor heat fade, heavy brake dust, or front-end weight. This StopFlex kit pairs a 400mm front carbon-ceramic rotor with the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper and a 380mm rear carbon-ceramic package to add thermal capacity while reducing rotating mass versus comparable iron hardware. Each kit is built around the buyer’s exact A4, S4, or RS4 trim because B7 upright geometry, hub position, rotor-hat offset, and wheel clearance cannot be treated as one platform-wide fitment.\u003c\/p\u003e\n\u003cul class=\"check\"\u003e\n\u003cli\u003e\u003cspan\u003e400mm front carbon-ceramic rotors require 20 inch or larger wheels on the 2005-2008 Audi A4 \/ S4 \/ RS4 B7, and spoke clearance must be checked with the final wheel spec.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe front axle uses the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper, not a generic six-piston casting, with brackets and hat offsets matched to the confirmed B7 trim.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe rear package uses 380mm carbon-ceramic rotors with a TTSPORT EP4 4-Piston Caliper with EPB hardware, but factory B7 cars use a manual cable handbrake, so parking-brake integration must be confirmed during order engineering.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection class=\"box red\"\u003e\u003ch2\u003eFitment Hard Lines\u003c\/h2\u003e\n\u003cdiv class=\"scroll\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth class=\"accent\"\u003eField\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003eAudi A4 \/ S4 \/ RS4 (B7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel years\u003c\/td\u003e\n\u003ctd\u003e2005-2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront setup\u003c\/td\u003e\n\u003ctd\u003eGenuine Akebono OEM Audi RS 6-Piston (9N) Caliper \/ 400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear setup\u003c\/td\u003e\n\u003ctd\u003eTTSPORT EP4 4-Piston Caliper with EPB \/ 380mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePage type\u003c\/td\u003e\n\u003ctd\u003eComplete CCB kit upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum wheel size\u003c\/td\u003e\n\u003ctd\u003e20\" (for the 400 mm front rotor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sf-emph\"\u003e\u003cp\u003eEvery StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles\/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003cp\u003eThis setup uses a 400 mm front rotor, so the minimum wheel size is 20\". Wheels under 20\" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.\u003c\/p\u003e\n\u003cdiv class=\"scroll\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth class=\"accent\"\u003eWheel Size (Standard)\u003c\/th\u003e\n\u003cth\u003eDisc Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15\"\u003c\/td\u003e\n\u003ctd\u003e260 mm – 285 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e16\"\u003c\/td\u003e\n\u003ctd\u003e285 mm – 300 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e17\"\u003c\/td\u003e\n\u003ctd\u003e300 mm – 330 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18\"\u003c\/td\u003e\n\u003ctd\u003e330 mm – 355 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e19\"\u003c\/td\u003e\n\u003ctd\u003e355 mm – 380 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20\"\u003c\/td\u003e\n\u003ctd\u003e380 mm – 400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21\"\u003c\/td\u003e\n\u003ctd\u003e400 mm – 420 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e22\"\u003c\/td\u003e\n\u003ctd\u003e420 mm – 440 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eCaliper Overview — Front \u0026amp; Rear Balance\u003c\/h2\u003e\n\u003cdiv class=\"grid g2\"\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eFront Caliper (Primary Upgrade)\u003c\/h3\u003e\n\u003cp\u003eThe Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper is the primary front upgrade and spreads hydraulic load across six pistons for more even pad loading, stronger clamp control, and a firmer pedal under repeated stops. Its credibility comes from being a genuine OEM-derived Audi RS\/Akebono caliper rather than an anonymous aftermarket body, and StopFlex engineers the mount and rotor-hat relationship around the buyer’s exact B7 A4, S4, or RS4 front upright and hub geometry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eRear Caliper (Balance)\u003c\/h3\u003e\n\u003cp\u003eThe TTSPORT EP4 4-Piston Caliper with EPB adds rear-axle thermal capacity and helps keep braking balance stable with the 400mm front package. The EP4 design uses four hydraulic service pistons plus a dedicated EPB actuator piston, but because the Audi B7 A4\/S4\/RS4 factory parking brake is cable-operated, StopFlex must confirm the customer’s parking-brake requirement before final rear configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sf-emph\"\u003e\u003cp\u003e\u003cstrong\u003eFront \u0026amp; rear, engineered together:\u003c\/strong\u003e A 400mm front-only conversion can shift the car toward front-heavy brake behavior if the rear axle is left as an afterthought. StopFlex matches the 400mm front and 380mm rear carbon-ceramic assemblies together so piston area, rotor diameter, hat offset, bracket geometry, and wheel clearance are engineered as one system for the confirmed trim.\u003c\/p\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eMake It Yours — Color \u0026amp; Logo Customization\u003c\/h2\u003e\n\u003cdiv class=\"sf-emph\"\u003e\n\u003cp\u003eEvery StopFlex kit-upgrade order can be finished with \u003cstrong\u003ecustom caliper colors\u003c\/strong\u003e, a \u003cstrong\u003ecustom caliper logo\u003c\/strong\u003e, and \u003cstrong\u003ecustom rotor hat colors\u003c\/strong\u003e, so the brake package matches your exact build instead of a fixed off-the-shelf look.\u003c\/p\u003e\n\u003cul class=\"check\"\u003e\n\u003cli\u003e\u003cstrong\u003eCustom caliper color\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom caliper logo\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCustom rotor hat color\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eWhy StopFlex CCB\u003c\/h2\u003e\n\u003cdiv class=\"grid g3\"\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eLower Unsprung Mass\u003c\/h3\u003e\n\u003cp\u003eStopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eHigh-Temperature Stability\u003c\/h3\u003e\n\u003cp\u003eThe carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eRust-Free Rotor Surface\u003c\/h3\u003e\n\u003cp\u003eCarbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eLong Street-Service Potential\u003c\/h3\u003e\n\u003cp\u003eIn normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eLow Visible Dust\u003c\/h3\u003e\n\u003cp\u003eWhen paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003ePremium Ceramic-Glaze Appearance\u003c\/h3\u003e\n\u003cp\u003eStopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eStreet-Usable Cold Bite\u003c\/h3\u003e\n\u003cp\u003eStreet Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch3\u003eContinuous Fiber Reinforcement\u003c\/h3\u003e\n\u003cp\u003eLong-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eHeat Management Note\u003c\/h2\u003e\n\u003cp\u003eCarbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak into pads, fluid, seals, calipers, wheels, and nearby components. For long track sessions, mountain descents, or sustained aggressive driving, brake cooling and high-temperature fluid are still recommended.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eStreet \/ Track-Day \/ Motorsport Rotor Options\u003c\/h2\u003e\n\u003cdiv class=\"grid g3\"\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/8933\/5811\/files\/StopFlex_Street_CCB_Rotor.jpg?v=1773907551\" alt=\"StopFlex Street Spec carbon ceramic brake rotor\"\u003e\u003ch3\u003eStreet Spec\u003c\/h3\u003e\n\u003cp\u003eCeramic coating, cross-drilled face, and large cooling channels.\u003c\/p\u003e\n\u003cp\u003eBest for daily driving and premium street builds that need clean cold bite, low dust, corrosion-free appearance, and long service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/8933\/5811\/files\/StopFlex_Trackday_CCB_Rotor.jpg?v=1773907551\" alt=\"StopFlex Track-Day Spec carbon ceramic brake rotor\"\u003e\u003ch3\u003eTrack-Day Spec\u003c\/h3\u003e\n\u003cp\u003eCeramic coating, blank face, and honeycomb cooling channels.\u003c\/p\u003e\n\u003cp\u003eBest for fast-road and track-day use where repeated braking stability matters more than maximum visual drilling style.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/8933\/5811\/files\/StopFlex_Racing_CCB_Rotor.jpg?v=1773907551\" alt=\"StopFlex Motorsport Spec carbon ceramic brake rotor\"\u003e\u003ch3\u003eMotorsport Spec\u003c\/h3\u003e\n\u003cp\u003eUncoated blank face with honeycomb cooling channels.\u003c\/p\u003e\n\u003cp\u003eBest for race-focused builds that run competition pads, high-temperature fluid, cooling strategy, and a proper warm-up window. Not the default street choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003ePackage Scope\u003c\/h2\u003e\n\u003cdiv class=\"scroll\"\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth class=\"accent\"\u003eItem\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront calipers\u003c\/td\u003e\n\u003ctd\u003eGenuine Akebono OEM Audi RS 6-Piston (9N) Caliper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront CCB rotors\u003c\/td\u003e\n\u003ctd\u003e400mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear calipers\u003c\/td\u003e\n\u003ctd\u003eTTSPORT EP4 4-Piston Caliper with EPB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear CCB rotors\u003c\/td\u003e\n\u003ctd\u003e380mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCCB brake pads\u003c\/td\u003e\n\u003ctd\u003eMatched for the supplied StopFlex carbon ceramic rotors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRotor hats and floating hardware\u003c\/td\u003e\n\u003ctd\u003eVehicle-specific hardware package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrake lines\u003c\/td\u003e\n\u003ctd\u003eIncluded for complete kit-upgrade orders\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor customization\u003c\/td\u003e\n\u003ctd\u003eCustom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrder scope\u003c\/td\u003e\n\u003ctd\u003eDefault listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"box\"\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this kit fit every 2005-2008 Audi A4, S4, and RS4 B7 the same way?\u003c\/summary\u003e\u003cdiv class=\"a\"\u003e\u003cp\u003eNo. StopFlex does not treat the B7 chassis as one universal bolt-on fitment; A4, S4, and RS4 trims can differ in upright, hub, offset, and wheel-clearance details, so brackets, rotor hats, and caliper mounting are engineered for the confirmed car.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat wheel size do I need for the 400mm front rotor?\u003c\/summary\u003e\u003cdiv class=\"a\"\u003e\u003cp\u003eThe 400mm front carbon-ceramic rotor requires 20 inch or larger wheels. Wheel diameter alone is not enough; StopFlex also checks barrel shape, spoke clearance, offset, and caliper template fitment for the Genuine Akebono OEM Audi RS 6-Piston (9N) Caliper.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill the rear electronic parking brake work on my B7?\u003c\/summary\u003e\u003cdiv class=\"a\"\u003e\u003cp\u003eThe Audi B7 A4\/S4\/RS4 did not leave the factory with an EPB; it uses a manual cable handbrake. The listed TTSPORT EP4 rear caliper includes EPB architecture, so the rear parking-brake solution must be confirmed during order engineering for the exact car.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhy choose carbon-ceramic rotors instead of another iron big-brake kit?\u003c\/summary\u003e\u003cdiv class=\"a\"\u003e\u003cp\u003eCarbon-ceramic rotors reduce rotating and unsprung mass compared with similarly sized iron rotors, produce far less visible brake dust, and tolerate repeated heat cycles better in high-speed street, mountain, and track use when paired with the correct pads and caliper balance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"cta\" id=\"contact_form_page\"\u003e\u003ch2\u003eNeed Fitment Confirmation?\u003c\/h2\u003e\n\u003cp\u003eSend the exact vehicle details, current rotor sizes, and caliper type before ordering.\u003c\/p\u003e\n\u003cdiv class=\"cta-row\"\u003e\n\u003ca class=\"btn\" href=\"\/pages\/carbon-ceramic-brakes\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCarbon Ceramic Brakes: Buying \u0026amp; Fitment Guide\u003c\/a\u003e\u003ca class=\"btn ghost\" href=\"#contact_form_page\"\u003eConfirm Fitment\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"StopFlex","offers":[{"title":"Default Title","offer_id":48333568868611,"sku":"100263","price":5000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/8933\/5811\/files\/Product_Genuine_Akebono_OEM_Audi_RS_9N_6-Piston_Caliper_90431a0b-9eb3-42f7-a989-4da6bd2234f6.png?v=1780913895","url":"https:\/\/stopflex-ccb.com\/products\/audi-a4-s4-rs4-b7-akebono-9n-400mm-ccb-kit","provider":"StopFlex","version":"1.0","type":"link"}