Thread: SE Single Exhaust to Two Mufflers

Hello people, I want to make my 1999 SE 3800 Grand Prix have two mufflers. I know it's not "dual" exhaust but if I add another muffler wouldn't it be louder? I went to two shops, one of them told me they'll weld a y-pipe on the pipe before the muffler and run it to the other side where there would naturally be another muffler on the GT/GTPs. The other one said it's not worth it. The car wouldn't have a louder sound. He said it'll sound like a motorcycle since it's a V6. I don't want it to sound too ricy, ricey, arroz. He said he can delete the resonator and put a straight pipe, but from what I heard that causes a drone sound. Will it cause a drone sound on a car that has one muffler, anyone have experience with this? I already have a magnaflow on it and I heard GTs and GTPs that have two magnaflow mufflers and they sound nice. I'm wanting a nice deep, mellow tone, with more than what I have now. If I go the y-pipe route on the pipe before the muffler would I achieve that sound, or is there something else to it. Thanks. I linked a video to my car and the way it sounds now.

I have a Magnaflow #11225. The dude at the shop said for better sound on two mufflers to get some Magnaflow Bullets. I don't want to replace the muffler I already replaced you know. How much do catback systems usually go for? The guy at the shop quoted me $95 to y pipe and and weld the new muffler on there.

I'll go to the junkyard and see what I can saw off of a 3800 w body. That's a true dual system right, the one on eBay and the one's in the junkyards. Compared to what the shop was going to do (weld a y-pipe on the pipe before the muffler). Should I try and do that y-pipe version as opposed to the shop just welding their y-pipe on the pipe before the muffler?

oh, okay. That makes sense! thanks!

I see, I looked under my car to see if it had some rings or placements at least, and it doesn't. So, I'll have to see what the shop can do as far as mounts goes, or what I can do.

tight, tight, tight. Cool. I wasn't sure if that was the way to go as far as mounting them. Now to see if any local junkyards have them. Houston isn't the best place to find w bodies intact. And I'll want to make sure they're straight since I don't have a GT/GTP bumper. I posted on WTB for one of those bumpers but shipping is turrible. And the junkyard's bumpers look like they've been through a blender and Guantanamo. Maybe a new batch will appear, and I have seen some nice GPs there before. like two.