78bluecorvette

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!!

KapsSA

L48 pipe would have 2 1/4" outlets.
L82 Has 2 1/2" outlets.

jb78L-82

https://www.summitracing.com/parts/wlk-40469

That pipe is 2.5 inch....L-82

78bluecorvette

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?

78bluecorvette

So, this one will work?

https://www.amazon.com/1976-1978-Corvette-Rear-Exhaust-Y-Pipe/dp/B000H18D4C

Kacyc3

do you have to pass emissions?

78bluecorvette

No. classic car tags

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?

78bluecorvette

great idea. Wouldn't that cost more than just the Y pipe? Would that not make it loud as hell?

cobrachuck

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

Kacyc3

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