One or Two flow 40's?
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Junior Member
Joined: Dec 2003
Posts: 34
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From: Portland, Oregon
Car: white 1991 z28 w/b;ack racing stripes
Engine: TPI 350
Transmission: world class t5
One or Two flow 40's?
I've got a 1991 z28 w/ a 350 , mild cam, 1 3/4 SLP headders and a 3" exhaust system. It has twin 2 1/2" cat's. The 3" muffler on there now has no packing left (the inside of it looks like the company put 2 glass packs into a flowmaster shell).
My question is if I should go with one or two flow 40's? My bro put on one on his Z and it sounds sweet (so I was thinking I probably need two
) If I do go with two, should I go with two 2.5" or two 3" flow 40's? Also I was thinking about getting rid of the Cats, cause I wount have to go through DEQ for at least 3 years. Any thoughts?
My question is if I should go with one or two flow 40's? My bro put on one on his Z and it sounds sweet (so I was thinking I probably need two
) If I do go with two, should I go with two 2.5" or two 3" flow 40's? Also I was thinking about getting rid of the Cats, cause I wount have to go through DEQ for at least 3 years. Any thoughts? 
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Getting two mufflers to fit anywhere on a 3rd gen is a challenge (and typically ground clearance challenging).
One 3" should fill the bill.
One 3" should fill the bill.
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