3''In/2.5 Dual Out
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Joined: Jul 2001
Posts: 5,225
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
3''In/2.5 Dual Out
For a 88 IROC, does it come outta the factory with a 3" pipe from Cat to muffler? If not, then someone had to put a 3" in right? So it would fit into the muffler?
Just curious
Thx guys
Just curious
Thx guys
Joined: Jul 2000
Posts: 7,386
Likes: 1
From: In a mint Third Gen!
Car: Red 87 IROC-Z28 T-Top
Engine: 5.7 Tuned Port Injection
Transmission: 700R4 Auto
Axle/Gears: BW 9-Bolt 3.27
I'm pretty sure it was 2.75, some1 would have had to put that in themselves.
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Moderator
Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by IROCZTWENTYGR8
I'm pretty sure it was 2.75, some1 would have had to put that in themselves.
I'm pretty sure it was 2.75, some1 would have had to put that in themselves.
So would it be considered a cat back?
Thx for the response
Thread Starter
Moderator
Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by IROCZTWENTYGR8
Is it mandrel??
Is it mandrel??
Lol
[Newb]Whats that mean?[/Newb]
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Joined: Sep 2001
Posts: 2,031
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From: Cincinnati, OH
Car: 87 Iroc Z
Engine: 383ci.
Transmission: WC-T5
They can come from GM with a single 3" from the cat back to a crossflow muffler and out 2.5" duals.
I recently had the option to change to a true dual, but the single pipe flows just as good and the crossflow muffler creates backpressure, which gives you more bottom end.
I recently had the option to change to a true dual, but the single pipe flows just as good and the crossflow muffler creates backpressure, which gives you more bottom end.
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