Quote:
Originally Posted by usa1camaro1969
The stock exhaust itself isn't very restrictive, the manifolds are. You'll still see good gains(it's a 3.6L with duals running 2.25" tubes, the stock 396 exhaust in my '68 was 2.25" and restricted that motor).
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Yea I was refering to the stock Catback. Thanks for the conformation lol
