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Stock Exhast System

S

secondchance

Guest
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

Well-known member
Joined
Dec 6, 2000
Messages
1,291
Location
Bradenton, FL
Corvette
'90 ZR-1 #3010
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

Well-known member
Joined
Sep 7, 2001
Messages
113
Location
Babylon NY
Corvette
1991 White ZR1-93 Green ZR1/LSV 385 98 Convert.
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

Site Administrator
Staff member
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Sep 16, 2000
Messages
13,762
Location
New Hampshire
Corvette
1990 Corvette ZR-1
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".
 
S

secondchance

Guest
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

Site Administrator
Staff member
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Joined
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Messages
13,762
Location
New Hampshire
Corvette
1990 Corvette ZR-1
I know that it was made less restrictive, but I don't know about changes in size.
 

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