HKS MANIFOLD with CAT For BRZ
This is the nicest header I've ever seen for the BRZ, HKS is always top notch quality R&D and it shows in their products. Highly recommend!

NOT CARB-APPROVED. ILLEGAL TO USE OR INSTALL IN CALIFORNIA. IF YOU LIVE IN CA, WE CANNOT SHIP YOU THIS ITEM
The exhaust manifold of 86/BRZ is very important for higher power. Stock exhaust manifold has a catalyzer and it's causing a resistance for exhaust output that make the engine to perform poorly. HKS SUPER MANIFOLD with CATALYZER GT-SPEC for ZN6/ZC6 uses a compact and high cleaning capacity catalyzer, still it has a low resistance which passes Japan Exhaust Gas Regulation. It's a high and efficient performance manifold for your 86/BRZ.