What a Widebody Kit Does to the Audi RS5 (B9)
Search for an RS5 widebody kit and the first results are a trap for B9 owners. The SR66 wide body kits at the top of Google are made for the earlier 8T A5, S5 and RS5, the B8 and B8.5 cars sold up to 2015. Liberty Walk's well-known Audi kit, with its fibreglass or carbon arch extensions, front splitter, side skirts, diffuser and wing, was built for the 8T A5 and B8 S5, and retailers still list its parts for those cars. None of them fit the 2017-on B9 RS5. The B9 is a different car: a 2.9-litre twin-turbo V6 with 444 hp and 443 lb-ft, quattro all-wheel drive and an eight-speed automatic. It was sold as a coupe and, in the US from 2019, as a Sportback, with a facelift known as the B9.5 from 2020. What you can actually buy for it is carbon aero, not width. Revozport sells a full carbon kit for the B9.5 coupe at $11,041, made up of a front lip, grille add-on, canards, bonnet, side skirts, rear diffuser and rear spoiler, and sold as plug-and-play with no trimming. Karbel Carbon lists dry-carbon full kits for both the 2017–2019 B9 and the 2020-on B9.5, and Future Design makes its Blaze kit for the B9.5. A wide B9 RS5 is therefore one of two builds. Factory-plus means carbon aero, a drop and wider wheels under the standard arches. A true widebody means bespoke flares made for your car by a body shop.
What a RS5 Widebody Kit Actually Costs
The firm prices for the B9 are carbon prices. Revozport's B9.5 coupe kit is $11,041 and its Sportback kit is priced the same, with single parts such as the front lip at $1,349 and the carbon bonnet at $4,465. Karbel Carbon and Future Design kits are sold through dealers on request. If you want real width, the route is fabricated flares on a car that already has muscular arches, and that is a body shop job. Expect roughly $2,500–$6,000 for flares fitted and blended, plus $2,000–$4,000 to paint them and the panels around them to match. Those are our estimates, because no shop publishes a B9 widebody price. Liberty Walk's earlier Audi kit was reported at about $11,000 complete when it launched, a useful marker for what a full named widebody costs, even though it does not fit a B9. Wheels are the other half of the look. The B9 RS5 uses a 5x112 bolt pattern with a 66.5 mm centre bore and M14x1.5 bolts, and comes on 19x9 +24 wheels with 265/35R19 tyres or optional 20x9 +26 wheels with 275/30R20 tyres. Owners chasing a wider stance without flares usually move to 20-inch wheels at a lower offset with a drop on coilovers; measure before buying, because the margin under the factory arches is small. Add it up: carbon aero, wheels and a drop is a $15,000–$20,000 build, and bespoke flares with paint, wheels and suspension is $12,000–$20,000. Both are estimates, and doing both lands above either figure.
Try it on your RS5 before you spend
The B9 RS5 already has strong arches, so the question is whether more width improves the shape or overdoes it. Upload a photo of your own RS5, choose widebody kit, and see flared arches on the real car in about 30 seconds, before you spend five figures on carbon or bodywork.
Upload your RS5 photo, free →How to Render Your RS5 With a Widebody Kit
- 1Upload a photo of your RS5. Any well-lit angle works; side-on captures bodywork modifications like widebody kits the cleanest. JPG or PNG, up to 10MB.
- 2Select Widebody Kit as your style. The AI maps your RS5's panels and stance before rendering, so the result fits your exact car rather than a stand-in.
- 3Download your render. About half a minute later it's ready. Free renders carry a watermark; Pro ($14/mo or $69/yr) delivers 250 clean HD renders a month, great to hand an installer.
Planning your RS5 widebody build?
- widebody before and after: real builds vs renders: how close a render gets to the finished car
- best JDM cars for a widebody kit: Japanese platforms ranked by kit support
