Muffler Selection for LS1

**162hotrod** · 08-14-2012, 06:00 AM

Folks: I need some help selecting mufflers for my LS1 in my 62 wagon. I have been told that the mufflers have to have sufficient back pressure to make the LS1 run properly. Is this true? How do you know the muffler has sufficient back pressure? I have put an old set of mufflers on the car to get it started but I need to make a final decision on what I will run. Any advice is appreciated. Thanks again!

**WICKEDLS1** · 08-14-2012, 07:16 AM

ive never heard of the need for lots of back pressure hell ive always had a very open exhaust set up on all 3 ls cars ive owned. but as far as muffler selection i would recommend a set of dynomax bullets with an x pipe thats one of the best sounds for them i think.

**Knight** · 08-14-2012, 08:23 AM

The backpressure rumor is wrong. Actually, a less restrictive exhaust is better. I personally run a Borla muffler on mine, and love the sound. There are quite a few muffler brands to choose from though. Try checking YouTube for different combos to find what you like.

**162hotrod** · 08-14-2012, 08:38 AM

As always, I knew you guys could give me the "low-down" on this. I can't thank everyone enough for this website and how it has helped me over the last few months. Thanks again.

**WICKEDLS1** · 08-14-2012, 09:16 AM

anytime

**Knight** · 08-14-2012, 09:26 AM

**GoldenFlame** · 08-14-2012, 05:37 PM

Originally Posted by WICKEDLS1

a set of dynomax bullets with an x pipe

They sound good but do yours Drone? My buddy had the TSP X with those bullets and it was unbearable for me, yet my Sweet Thunders didn't drone at all.

**SS Camaro UK** · 08-15-2012, 01:23 AM

The backpressure myth came about because people were fitting exhausts that were bigger than they needed, this resulted in reduced exhaust velocity, which got confused with reduced backpressure.

**WICKEDLS1** · 08-17-2012, 09:49 AM

Originally Posted by GoldenFlame

They sound good but do yours Drone? My buddy had the TSP X with those bullets and it was unbearable for me, yet my Sweet Thunders didn't drone at all.

mine do a little but not too bad i just dont think the sound they make at wot can be touched by any other brand plus they sound great chopping at a stop light too

**az gt eater** · 08-18-2012, 11:38 AM

Originally Posted by WICKEDLS1

mine do a little but not too bad i just dont think the sound they make at wot can be touched by any other brand plus they sound great chopping at a stop light too

I would like to hear that in person, cause I would say that my Lt's and Loudmouth are unbeatable for pure raw sound. Snarly. Cold start up makes people jump. And the popping when decelerating under load makes me giggle. Takes alot to make a grown ass man giggle.

**WICKEDLS1** · 08-18-2012, 11:52 AM

Originally Posted by az gt eater

I would like to hear that in person, cause I would say that my Lt's and Loudmouth are unbeatable for pure raw sound. Snarly. Cold start up makes people jump. And the popping when decelerating under load makes me giggle. Takes alot to make a grown ass man giggle.

idk i dont like the popping which is why im not a big fan of the lm1's there basically just pipe no baffles packing or anything they just sound to much like straight pipe for me now lm2's are a different story

**Firebirdjones** · 08-18-2012, 01:05 PM

Originally Posted by 162hotrod

Folks: I need some help selecting mufflers for my LS1 in my 62 wagon. I have been told that the mufflers have to have sufficient back pressure to make the LS1 run properly. Is this true? How do you know the muffler has sufficient back pressure? I have put an old set of mufflers on the car to get it started but I need to make a final decision on what I will run. Any advice is appreciated. Thanks again!

Pick your favorite pair of mufflers and run without worries.

**az gt eater** · 08-18-2012, 01:32 PM

Originally Posted by WICKEDLS1

idk i dont like the popping which is why im not a big fan of the lm1's there basically just pipe no baffles packing or anything they just sound to much like straight pipe for me now lm2's are a different story

To each their own. I would honestly like to hear your setup in person. I do like the Borla's, and am open to admiring other options. As far as the popping under load in decel, to me, that sounds like the old school muscle, and that is why I like it so. You can actually hear the gas burbling as it is wasted igniting in the exhaust. I am not about ruining the planet, it just sounds so intimidating, and has a raw appeal that boils your blood. Again, to each their own. I respect yours, you respect mine. Harm none, do what ye will.

**WICKEDLS1** · 08-18-2012, 01:34 PM

exactly lol your car your choice my car my choice

**az gt eater** · 08-18-2012, 01:39 PM

Originally Posted by WICKEDLS1

idk i dont like the popping which is why im not a big fan of the lm1's there basically just pipe no baffles packing or anything they just sound to much like straight pipe for me now lm2's are a different story

Yeah, I don't think I would describe the LM1 as a muffler, more of a resonating chamber. It doesn't even fit in, nor would fill the muffler chamber under our trunk decks where the factory muffler goes, it just sits alongside our torque arm. Not much muffling to it, if at all.