VRSF 3.5" Race Cast Downpipes Nissan GTR R35VRSF 3. 5" Race Cast Downpipes Nissan GT R R35 The factory downpipes on the R35 GT R are a restriction that limits what the twin turbo VR38 can do. The VRSF 3. 5" Race Cast Downpipes eliminate that restriction with a cast stainless steel bell mouth design, reducing back pressure significantly and delivering faster spool, more power, and a more aggressive exhaust note. Direct OEM replacement fitment, compatible with both the stock exhaust and