stock exhaust
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Junior Member
Joined: Mar 2009
Posts: 39
Likes: 0
From: Gilbert, AZ
Car: 1992 B4C
Engine: L98 soon to be 383
Transmission: 700r4
Axle/Gears: 3.23
stock exhaust
on a 90 iroc 5.7L did they come with stock dual pipes or single coming out of the muffler? or did it have the option for both?
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: stock exhaust
Stock is a single 2.75" intermediate pipe, going over the axle into a single muffler, and dual tail pipes, one on each side.
Senior Member
iTrader: (5)
Joined: Apr 2008
Posts: 696
Likes: 0
From: Putnam Valley, NY
Car: 1992 RS 6spd
Engine: Carbed 357c.i.
Transmission: Built T56
Axle/Gears: Soon to be Strange S60
Re: stock exhaust
Arent all third gens y-piped either before the cat, or dualcat y-piped into single with one muffler and dual tips?
you are right. 
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
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