Nissan RB26/30DET T3 Exhaust Manifold*Suits Nissan RB26 head with RB30 block* All 6Boost manifolds are individually hand made in Australia. They are specifically designed for your application and built around unique "merge collector" design. This means no pipes cross each other and the merge collector directs all exhaust gases at the turbine entry. We have these to suit many combinations, if you don't see the combination you require in our selection please email and we can have one