muffler advice?

**backinblackgtp** · 04-06-2010

looking into mufflers, and found some really cheap thrush mufflers, and flowmasters, anyone know how they sound on gtps?

im not doing a full exhaust considering i just got a new resonator 3 months ago, and the piping to the mufflers arent in bad shape, just the mufflers.

thanks

**TheOtherNick** · 04-06-2010

YouTube - Broadcast Yourself.

**BwolfGT** · 04-06-2010

Originally Posted by 01GTP

YouTube - Broadcast Yourself.

This. A friend of mine has thrush, sound decent. I hate the way flowmasters sound on these cars, haven't heard good things either.

**Bio248** · 04-06-2010

i have flow 40s on my car. with a big glasspack they sounded alright, but they drone like a mofo. i went back to a stock catback after i had these, so i dont have any opinons on much other mufflers. the only muffler i really liked on people's cars are borla, but they arent 'cheap' either.

as a whole, chambered mufflers sound like butt on our cars.

**backinblackgtp** · 04-06-2010

ya i was looking at thrush, i saw a bunch of glasspacks but not regular mufflers, so which ones are you talking about.

And i think every car with an exhuast has drone mustangs and GTOs do atleast.

**Bio248** · 04-06-2010

this drone at 45 mph vibrated my car. that is too much.

**TorqueAutoMotiv** · 04-06-2010

I had minimal drone with my magnaflows but with no tips it got way worse so I thru a res back on it

The drone in my crown vic is way worse with thrushes dumped at the axle

**CTKGP09** · 04-06-2010

i have heard borlas on a GP before and i loved how it sounded

**backinblackgtp** · 04-07-2010

borla is way too much.

do these cars get really raspy after like 4000rpms? thats what i was told

**dagger** · 04-07-2010

I have a 3" downpipe with cat and stock catback with the mufflers replaced with flowmaster 40 series. I'm not sure where people get that these things sound like ass with them because I love the way it sounds. Yes it does drone a little but nothing that you wouldn't expect with replacing the mufflers for performance ones. I have the stock resonator but I wanted to change that out for something as well. Maybe a glass pack or maybe some whisper resonator from ZZP.

**Bio248** · 04-07-2010

they get really raspy when you dont have a resonator/glasspack. having a cat helps too.

Originally Posted by dagger

I have a 3" downpipe with cat and stock catback with the mufflers replaced with flowmaster 40 series. I'm not sure where people get that these things sound like ass with them because I love the way it sounds. Yes it does drone a little but nothing that you wouldn't expect with replacing the mufflers for performance ones. I have the stock resonator but I wanted to change that out for something as well. Maybe a glass pack or maybe some whisper resonator from ZZP.

try those same mufflers with a full 2.5" catback and no resonator. they are loud.

**NashGT02** · 04-07-2010

Im getting a SLP Powerflo catback sometime in the future when I decide to change my exhaust. I dont think their is much you can do about rasp in these cars. Hell the stock exhaust has some rasp to it.
YouTube - 1998 Pontiac Grand Prix GTX SLP Cat Back exhaust
YouTube - 01 grand prix GT
YouTube - Regal LS SLP PowerFlo

**ZR1Vette09** · 04-07-2010

you can get a borla muffler for 80 bucks.

**CTKGP09** · 04-07-2010

^^^ yep Pro XS's come in the inlet/outlet sizes for the stock catback for $80-$100 each

**GTPJOE90** · 04-07-2010

BRIAN I BELIEVE is referring to me..... i have a 3 inch catless downpipe stock ressy with dual thrush mufflers and tweaked em a bit with a few pin holes in the baffles.

sounds great i think. brian can vouch for me. "bwolf"

**BwolfGT** · 04-07-2010

Originally Posted by GTPJOE90

BRIAN I BELIEVE is referring to me..... i have a 3 inch catless downpipe stock ressy with dual thrush mufflers and tweaked em a bit with a few pin holes in the baffles.

sounds great i think. brian can vouch for me. "bwolf"

Yup, sounds good with no rasp that I noticed.

**GTPJOE90** · 04-07-2010

i dont like rasp!!! lol just low loud rumbles

**oneil.GTP** · 04-07-2010

Originally Posted by GTPJOE90

i dont like rasp!!! lol just low loud rumbles

x2 except imo all v6s are somewhat raspy, unless you spend the money. thou i dont know much about exhaust, personally a 3" dp with the rest stock sounds good enough to me. never been a fan of cat backs on anything but v8s.