Stock Exhast System

[secondchance]

I vaguely recall that 90-92 ZR-1s have 2.25" exhast pipes and 93-95 have 2.5" pipes. Can anyone confirm this?

 

[JT ZR-Won]

I thought they were all 2.75" all the way through for all the years:confused ;help

I'm not sure. I'm redoing my exhaust shortly with an all 3" system.

Jay

 

[FrankUrbinati]

A little more fuel on the fire ???? I thought that all the exhaust system's were 2 1/2 inch's. They all neck down to 2 1/4 inc's at the resinator's and muffler's.

:confused :confused

 

[Rob]

1990 - 1992 ZR-1 Exhaust System

Type: Dual
Muffler

----No & Type: 2 - straight through aluminized stainless steel
----Mass/Weight: 54.32 lbs (24.64 kg)

Resonator: One Cross Flow

Exhaust Pipe

----Branch O.D. Wall Thickness
--------Right Hand: - 2.75 x 0.054 in. (69.85 x 1.37 mm)
--------Left Hand: - 2.75 x 0.054 in. (69.85 x 1.37 mm)
----Material: Aluminized Stainless Steel

Intermediate Pipe

----O.D. Wall Thickness
--------Right Hand: - 2.75 x 0.04 in. (69.85 x 1.09 mm)
--------Left Hand: - 2.75 x 0.04 in. (69.85 x 1.09 mm)
----Material: Aluminized Stainless Steel

Tail Pipe

----O.D. Wall Thickness
--------Right Hand: - 2.75 x 0.05 in. (69.85 x 1.37 mm)
--------Left Hand: - 2.75 x 0.05 in. (69.85 x 1.37 mm)
----Material: Aluminized Stainless Steel


These specs come from an old Vette Vues magazine. I was under the impression that the stock ZR-1 exhaust system was 2.50".

 

[JT ZR-Won]

Cool info Rob, thanks.

Jay

 

[secondchance]

Thanks Rob. If you come up with simmilar info for 93-95, please let me know. I recall reading that there was revision to the exhast for later years. Maybe, I'm mistaken.:confused

 

[Rob]

I know that it was made less restrictive, but I don't know about changes in size.

 

[secondchance]

Maybe, thats what I'm remembering.