93 Caprice LTZ exhaust question - Chevy Impala SS Forum
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post #1 of 4 (permalink) Old 08-17-2014, 10:04 AM Thread Starter
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93 Caprice LTZ exhaust question

The original exhaust finally gave up after 21 years. Does anyone know if its possible to do a dual outlet muffler and run dual tailpipes? Cant seem to find any info. Id like to do real duals but the pipe would hang low due to the crossmember. I want something with a little rumble at least. I have a guy who will bend pipe for me.
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post #2 of 4 (permalink) Old 08-17-2014, 11:41 AM
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Shilaeli Hugger's Avatar
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Location: Newcomerstown,Oh
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you could always find a crossmemeber for a 94 and up car to run duals. think there is some slight modifying to make it fit. i dont think theres enough room to run duals off a dual outlet muffler but i could be wrong.

96 BBB 9c1. Rebuilt out of lets just say north of 30 cars.
94 MGR L99. Met a bridge.
92 White L03. Ran to death.
94 OSP 9C1. Lawn ornament.
91 Silver L03. Whales on ice is sad.
94 Black 9c1 clone. Sacrificed.
92 DCM to flat black L03 RMW. Blowed up... twice.
96 Black Woody RMW. Cannibalized.
92 Grey RMS L05. New daily driver.
"i built it one piece at a time, and it didn't cost me a dime!" Johnny Cash
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post #3 of 4 (permalink) Old 08-18-2014, 07:31 AM
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Cut and weld a notch in your original crossmember and you can run true duals. It was easier to do that than to try to fit the 94-96 crossmember. Get the drivers side heat shields from an LT1 car so your not cooking the floor. I have seen cars with a splitter pipe right behind the cat going to twin mufflers / tailpipes before. However, I don't think that a muffler with 1 in, 2 out will work.

1993 Caprice LTZ / LS:
51,000 miles, L05, 3:08 Posi, Harris Prom, Lowering Springs, Bilsteins,
96 Steering Wheel, 9C1 Hoses, Dual Snorkel Intake,
SS Rear Disks, J55 Fronts, High Flow Cats, Dual Exhuast, Fleetwood Horns and Center Console, Roadmaster Rear Door Lights, LED Interior
1992 Caprice Wagon: Black Sapphire/Silver, L05, Tow Pack, 3:23 Posi, 9C1 Cluster, 96 Steering Wheel, Fleetwood Horns, LED Interior
1996 9C1 - Former Whelen Trade Show Car - SOLD
1994 SS - SOLD
1991 9C1 - SOLD
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post #4 of 4 (permalink) Old 08-18-2014, 04:54 PM
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If you are going to keep it at the original height, you can put the hump in your trans cross member. The pipe will run close to the floor, but you can pretty much mirror the passenger's side. I welded a channel piece from a junk yard cross member to the top of it, then cut the bottom out, and welded the holes closed. with pieces of what I cut out. You can cut the whole way to the inside of the top of the tube. You can bolt a hanger on the end bolt of the drive shaft loop.

If I did it over again, I would clearance the floor a little. I deleted the cat and did not use one on the driver's side. Without the cat, I did not install a heat shield, and do not notice any heat. If you are going to run the pipe along side of the tank, you should put a heat reflective tape on the tank. I put shorty headers on the car as well. One caution is to put the trans in 1st gear when setting up the pipe clearance.

I am running 2 1/2 inch pipes, and I have about 1/8 of an inch sticking below the frame. If you have load leveling, the driver's side muffler will take its place.

I wrapped my headers (they all rust unless they are stainless) to keep the engine compartment temps down. I am trying to be kind to my wiring, and the brake lines beside the driver's side header. You also need to put some insulator material around the area in front of the trans linkage pivot on the frame to keep from burning the wires.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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