Just pick the reducer size that matches the diameter of the header collector. Bolt it to the collector ring, and weld on the tailpipe. If you have a header without the collector ring, use Hooker slip–on reducers. They're sized to slip over the collector and weld to the exhaust pipe.
Super Competition Reducer, 3 Bolt Flange, 2.5" OD Collector to 2.5" OD Tailpipe, One Pair
L 8.250 in. x
W 4.750 in. x
H 4.750 in.
Weight 1.000 lb.
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