ISR Performance - RamHorn Top Mount Manifold MVS SCH10 - Nissan KA24DE S13/S14 (IS-SSHT-NKAT)The ISR RamHorn Manifold is built utilizing our heavy duty SCH10 weld el's and designed to allow the end user to retain P S and A C. We have test fit up to a 35 series turbo on this manifold without fitment issues. Does not include manifold to head gasket, we suggest using our multi layer gasket (part # IS EMG KA247) Use with our other components to complete a bolt on top mount kit Turbocharger (IS RSX3076R or IS RSX3576R) O2 housing (IS O2 KATM),