HKS Front Pipe w/High Flow Cat - Subaru BRZ ZD8/Toyota GR86 22+ 997 High-level computational flow dynamic (CFD)

High-level computational flow dynamic (CFD) software is leveraged to calculate the best possible internal angles and shapes to reduce turbulence and increase flow inertia

Enables AN hose upgrades on OEM fuel systems

once the cylinder head is bolted down the entire block is torqued into a new shape pulling your perfect round cylinders into an oval changing your measured clearances

Drop-in OEM replacement — no permanent modifications required

HKS Front Pipe w/High Flow Cat - Subaru BRZ ZD8/Toyota GR86 22+ 997 High-level computational flow dynamic (CFD)The HKS stainless front pipe with high flow catalyzer is designed for the Toyota GR86 (ZN8) and Subaru BRZ (ZD8). It replaces the stock front pipe with a larger diameter stainless unit that includes an upgraded catalyzer and resonator silencer, improving exhaust flow while retaining a catalytic converter for road use. In flow bench testing it achieved 30% greater flow at 150L s compared to stock even with the catalyzer in place, and the combination of