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1978 Y Pipe different between L48 & L82

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Old Sep 27, 2016 | 11:06 PM
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Default 1978 Y Pipe different between L48 & L82
Trying to buy a replacement Y pipe for my 78 L48 automatic Corvette and I'm wondering if there is a difference in the L48 and L82 Y pipe?

I found a Walker Y pipe that is an exact replacement, but doesn't list the different engines, but other sites do.

https://www.ebay.com/itm/361527760627

thanks everyone!!
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Old Sep 28, 2016 | 12:15 AM
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L48 pipe would have 2 1/4" outlets.
L82 Has 2 1/2" outlets.
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Old Sep 28, 2016 | 09:29 AM
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https://www.summitracing.com/parts/wlk-40469

That pipe is 2.5 inch....L-82
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Old Sep 28, 2016 | 12:05 PM
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Yeah...

i guess I need the 2 1/4 y pipe for my L48... ugh.

am I supposed to to replace the heat raiser (I think that is what is called) when replace the Y pipe?
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Old Sep 28, 2016 | 12:09 PM
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So, this one will work?

https://www.amazon.com/1976-1978-Corvette-Rear-Exhaust-Y-Pipe/dp/B000H18D4C
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Old Sep 28, 2016 | 12:35 PM
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do you have to pass emissions?
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Old Sep 28, 2016 | 01:14 PM
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No. classic car tags
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Old Sep 28, 2016 | 04:40 PM
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Originally Posted by 78bluecorvette
No. classic car tags
Why not route duals in place of the Y with x pipe all the way to where factory goes back to duals no cat?
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Old Sep 28, 2016 | 07:57 PM
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Originally Posted by Kacyc3
Why not route duals in place of the Y with x pipe all the way to where factory goes back to duals no cat?
great idea. Wouldn't that cost more than just the Y pipe? Would that not make it loud as hell?
Last edited by 78bluecorvette; Sep 28, 2016 at 07:58 PM.
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Old Sep 28, 2016 | 09:01 PM
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If your are looking for more performance from your car take it to a good muffler shop & have 2 1/2' duals installed, then re curve your distributor.
This is a performance up grade.
Oh by the way your manifold outlets are 2"
Good luck
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Old Sep 28, 2016 | 10:07 PM
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Originally Posted by 78bluecorvette
great idea. Wouldn't that cost more than just the Y pipe? Would that not make it loud as hell?
If you reconnect it to your existing exhaust its more cost effective while increasing performance. You can buy cheap pipes and x pipe, as if you go further with performance will ditch the stock styled arrangement.

AS for cost if you can find an exhaust shop to bend the pipes it could be cheaper than the ones you linked, ditch the cat and recycle it help offset cost. Use one of these x pipes
http://www.ebay.com/itm/Universal-Cr...lXpJO~&vxp=mtr
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