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04-10-2018
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#1 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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LT4 exhaust on a ZR-1
So I have been running Corsa for several years. I need a no resonance exhaust, but the snap crackle pop does seem to get annoying at times.
I had a chance to get a very low mileage LT4 Exhaust to try out, I wanted to see how is sounds Initial impressions are good to me, but I only drove it a short bit. I do have a couple small leaks I need to fix but it was a nice clean modification, Granted I am running Watson Headers (2") and a pair of Magnaflow 3" Cats. here are some pictures of the interface at the head pipes
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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04-10-2018
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#2 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: LT4 exhaust on a ZR-1
Looks good, nice job. LT4 exhausts are suppose to the most free flowing of the stock C4 exhausts. Had one on my 91’ L98, even sounded good.
H 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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04-10-2018
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#3 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: LT4 exhaust on a ZR-1
all done in the garage.. I even expanded my own pipes for the slip fit
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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04-11-2018
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#4 |
 
Join Date: May 2010
Location: Japan
Posts: 3,581
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Re: LT4 exhaust on a ZR-1
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Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 
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04-11-2018
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#5 |
 
Join Date: Apr 2015
Location: Kentucky
Posts: 363
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Re: LT4 exhaust on a ZR-1
It looks awesome... and completed in the garage.
 Let us know how it sounds and breathes when you get to drive it more. =D>
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'94 ZR1 LT5 - Dark Red Metallic '79 L82 4-speeds of fun '96 LT1 Borla, H-pipe, TB, CAI (Sold) "An adventure is only an inconvenience rightly considered. An inconvenience is only an adventure wrongly considered." -- G.K. Chesterton |
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04-11-2018
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#6 | |
 Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
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Re: LT4 exhaust on a ZR-1
Quote:
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04-11-2018
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#7 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: LT4 exhaust on a ZR-1
I used this:
https://www.amazon.com/Lisle-17350-P...70_&dpSrc=srch I will say that the bends are all OEM. I just cut the one side and stretched it and it lined up. The piece on the car was an extra piece I had, but will be swapping to one that is a bit longer to help mitigate a couple leaks Added picture with one end stretched with the tool.. needed to swap between 2 dies.. took 45mins..
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 Last edited by -=Jeff=-; 04-11-2018 at 10:52 PM. |
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04-11-2018
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#8 |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,169
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Re: LT4 exhaust on a ZR-1
sealed the joints tonight.. hoping for no leaks..
Hans the Magnaflows are a much better (easier) fit
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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04-11-2018
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#9 | |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: LT4 exhaust on a ZR-1
Quote:
H
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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