The Premier downpipes for the BMW 135i/335is N54 motor are available now. As any turbo car owner knows, offroad downpipes usually yield the largest gains in power for a bolt on product. Other than a Tune/flash, downpipes can NET you 2X or even 3X more power than an intake or catback exhaust system. Riss Racings 3" Offroad Catless downpipes improve your twin turbos flow by reducing back pressure and increasing power to an UNCANNY 330HP and 350TQ rocket. Constructed of 100% 304 Stainless Steel, this is the top quality grade Offroad downpipes available on the market. Installation is able to be done with a novice mechanic. Our techs can also help with the process during installation. Available in Polished and Black Stealth Ceramic Coating. * Now included with every purchase, Riss Racing 2.5" downpipe gaskets.

* Highest Grade Full 304-Polished Stainless Steel
* TIG Welded throughout the whole system!
* Straight flow, Mandrel Bent, 3” taper to 2.75" to 2.5" piping
* Reduced back-pressure for increased top-end performance
* Enhanced aggressive high-RPM sound
* 100% Direct Bolt-On & utilizes stock V-Band Flange/clamp
* Responsibly researched, developed, and engineered
* Riss Racing 2.5" Bullet Proof Gaskets with every order
* FIVE (5) YEAR MANUFACTURER’S WARRANTY