SDTransAM

iTrader: (5)

I thought I posted this already, maybe it got deleted for some reason. I can't find the thread, and have been searching for 3 days. Google, TGO and everything in-between and can't figure out why my car has this exhaust.

From what I can find this exhaust was only on '82 LU5 cars. Why does my '83 LG4 car have this muffler setup?

I thought it was aftermarket, or an add on, but there are no cuts, no other welds, no nothing saying it was put on at a previous time.

coolram62

iTrader: (2)

The dual muffler setup was RPO-N10 (and GM used it again for the dual cat setup). It was optional '82-'83 on V8 cars except for the '83 L69 which used a transverse single muffler that was more common and used all following years. I was once under the impression it was a '82-'83 LU5 only option but have seen it on a few other early original 3rd Gens. The L69 really change many things with better flowing exhaust manifolds,y-pipe,cat and the transverse muffler. And then you have a cost savings in not using this setup. My '83 CFI Z28 still has her N10 setup though I've swapped the LG4 shared front section with the L69 setup.

JamesC

iTrader: (5)

My 82-85 Parts and Illustration Cat. shows the dual set-up on some cars (LG4/Lu5) as late as 85.

JamesC

InfernalVortex

iTrader: (4)

If you look on some of the old thirdgen Hotwheels cars you can see this same exhaust system - it's stock.

SDTransAM

iTrader: (5)

Wow, thanks for all the good replies especially coolram62. I knew it was factory, just didn't know why my lg4 car had it, but now I do. Thanks.

IROCtheRoad

Do you have more pictures of how the piping was run from the headers back?

SDTransAM

iTrader: (5)

Manifolds back, no I don't, it looks just like the rest of them, tiny little crush bend pipes, single cat.

GICATA

That's the same exhaust my '83 T/A had new....I ordered the car with the LG4 305, that is stock. The exhaust pipe ran from the cat to the diff, where on the up swing it split into two smaller pipes that went over the axle to these mufflers.

bradley23150

iTrader: (10)

My 83 T/A also has this exhaust.

It's about to be cut off, though.

IROCtheRoad

It's interesting to see that though. In 10 years I've never seen it.

DizzTransAm

Here ya go...

InfernalVortex

iTrader: (4)

What were they thinking with this? I dont understand at all. That has got to be the silliest exhaust setup I've ever seen. I mean I've seen it from the axle back before... but never from the Y-forward. What's the point of just y-ing at the intermediate pipe and then just joining it back together like that? Maybe it just sounded awesome or something?