RB20DET RB25DET R31 R32 Low Lift HL182-B HCT-M042 Oil gallery requirements can vary

Oil gallery requirements can vary depending on cylinder head configuration

this manifold will out-perform its competitors as it has a uniquely designed 50-55mm V-Band flange that can accommodate many different turbochargers without without having to change the turbo flange

Based on the IGN1A smart coils found on Mercury boat engines

and a wider tuning window is possible

RB20DET RB25DET R31 R32 Low Lift HL182-B HCT-M042 Oil gallery requirements can vary272 272 9. 35mm 9. 35mm Valve Lift 272 drift strip cams for more mid high rpm power. Suits 58mm 68mm turbo. No cylinder head clearancing needed. Kelford Cams recommend valve spring KVS20 (non NVCS heads) KVS25R (NVCS heads).