1983 L-69 Stock exhaust
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Joined: Nov 2010
Posts: 12
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From: Pennsylvania
Car: 1983 Z-28 L69 H.O.
Engine: 5.0 HO
Transmission: 5 speed
Axle/Gears: 3.73
1983 L-69 Stock exhaust
Want keep this L-69 stock. Looking for OEM 3" pipe from cat back.. Has anyone replaced or substituted this with aftermarket 3" pipe.
Joined: Dec 2001
Posts: 9,946
Likes: 644
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1983 L-69 Stock exhaust
I haven't used this, but I wish I knew about it a couple months ago.
https://www.top-downsolutions.com/po...product_id=232
https://www.top-downsolutions.com/po...product_id=232
Joined: Sep 2005
Posts: 27,993
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 1983 L-69 Stock exhaust
Why? The stock L69 exhaust necks down to 2¼" or so at the muffler anyway.
The Hooker system bolts right up to your cat if you make the right adapter (4-bolt plate with a oval to 3" section), does away with the restrictions in the stock system, follows the stock routing and mounts to the stock hangers, and looks very much like stock, if you use simple turndowns instead of the Hooker tips at the exit.
The Hooker system bolts right up to your cat if you make the right adapter (4-bolt plate with a oval to 3" section), does away with the restrictions in the stock system, follows the stock routing and mounts to the stock hangers, and looks very much like stock, if you use simple turndowns instead of the Hooker tips at the exit.
Thread Starter
Junior Member


Joined: Nov 2010
Posts: 12
Likes: 3
From: Pennsylvania
Car: 1983 Z-28 L69 H.O.
Engine: 5.0 HO
Transmission: 5 speed
Axle/Gears: 3.73
Re: 1983 L-69 Stock exhaust
Well Thank you for that suggestion. Your knowledge is appreciated. I was not aware of the Hooker setup. Would you happen to have any numbers on the Hooker item or can I find it on just a search of their site..
Joined: Dec 2001
Posts: 9,946
Likes: 644
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1983 L-69 Stock exhaust
Whatever you get will require the exhaust shop to transfer the 4 bolt flange from your cat, if you still have it.
Joined: Sep 2005
Posts: 27,993
Likes: 2,485
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 1983 L-69 Stock exhaust
Sure, I'll look it up for you.
https://www.summitracing.com/parts/hok-16823hkr
You can see pretty clearly what I mean about the tips.
https://www.summitracing.com/parts/hok-16823hkr
You can see pretty clearly what I mean about the tips.
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Thread Starter
Junior Member


Joined: Nov 2010
Posts: 12
Likes: 3
From: Pennsylvania
Car: 1983 Z-28 L69 H.O.
Engine: 5.0 HO
Transmission: 5 speed
Axle/Gears: 3.73
Re: 1983 L-69 Stock exhaust
Thank you. I didn't search thru Summit, guess that is why I couldn't find it. appreciate your help..
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