Factory Y-pipe size?
10-31-2016, 04:19 PM
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Car: 1984 Z28
Engine: LG4 305/4bbl for now
Transmission: 5-Speed
Axle/Gears: 3.23 Posi
Factory Y-pipe size?
So I have an 84 ,Z28, LG4, 5 speed car. And it have a 2.5" Y pipe on it right now, but still the LG4 style cat. My question is what would the factory Y pipe size should have been, it still has the factory exhaust manifolds as well.
