Integrated Engineering ProCore Downpipe Kit - Audi S4/S5 B9/B9.5 3.0T Audi The 14mm lower bore is

The 14mm lower bore is a common standard compatible with a wide range of aftermarket top-feed injectors

Retainers are CNC-machined from 6061 aluminium and anodised to resist oxidation

Compatible Lift Pumps:

securing directly to hose ends without the need for extra adapter fittings

2012-2021 Subaru BRZ (ZC6) — FA20

Integrated Engineering ProCore Downpipe Kit - Audi S4/S5 B9/B9.5 3.0T Audi The 14mm lower bore isThe IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Our in house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. The specialty tri core design and precious metal coatings align with ECU emissions requirements so that you can upgrade without the check engine light. IE's in house engineered ProCore Catalyst features our own