Thread: Resonators; Now with some part numbers

Last season, there was a long discussion about exhaust and math.

Choosing a resonator looks like a crapshoot without getting into any of that.

It looks to me like the easiest (cheapest?) way to replace the stock one is to cut near the flange, kinda where I measured.



Then in the back, cut kinda there?



This 05 GTP then has almost 30" dead nuts to clamp in.

Does anyone know the key to not sounding like total garbage? Whatever diameter x28" ..x24" ..maybe even 2x12" length welded together?

Is worth considering smaller OD than 4 Inch? Seems like it would be loud.

Thanks for any advice!

my cat back was al slip joints, so i got a 32 inch glass pack, bought a flange cut the tube off one end and welded the flange on the gp.







i still have this too. i got a new cat back and saved it, cause we all know the res likes to rot out.

I shoved on and clamped this glass pack on a year ago, still on after a New England winter......

See post #7430 in the "boat" section for more info.....

Looked through a bunch of catalogs for bigger 2.25" resonators/mufflers for reference.

These are all center on center. Part numbers only, source and pricing up to you. I'm bookmarking for later.

Listed by diameter, smallest to largest - Muffler/can length - Overall length (OAL)

Stock on 2005 CompG

4.5" Round - 29" can -32" OAL (approx)

Walker OE Replacement

4" Round - 24.25" can - 30" OAL - PN# 21383 - includes welded flange to mount to stock downpipe

Magnaflow Aluminized (*Red finish)

3.5" Round - 22" can - 26" OAL - PN# 18135, *13135

3.5" Round - 26" can - 30" OAL - PN# 18145, *13145

Patriot Exhaust (China)

3.5" Round - 26" can - 30" OAL - PN# H3014, *Advertised as Hammertone finish

3.5" Round - 30" can - 35" OAL - PN# H3015 *Also in Hammertone

AP Exhaust, makers of Cherry Bomb Listed by size can/silencer, then name sold under, etc.

4" Round Xlerator Stainless Steel - 18" can - 24" OAL - PN# XS0425 (Also sold under Jones Exhaust PN# JXS0425)

4" Round Enforcer Aluminized glasspack - 22" can - 28" OAL - PN# 402211S

4" Round Enforcer Aluminized glasspack - 30" can - 36" OAL - PN# 403011S

4" Round Enforcer Turbopack. These have a restrictive 1.75" core to be quieter - 24" can - 30" OAL - PN# 4224112S

7" Round Enforcer II. Truck muffler w/turndown you'll have to cut off. I don't think it'll fit, but here it is - 26" can - 32" OAL - PN# 4267

Note: I did measure 7" using a template. It'll fit, but it's very tight. Might vibrate on the tunnel or hit the ground without modification to the tunnel and/or muffler.

Stainless Works Exhaust Don't know much about these, and they're expensive. 304 Stainless throughout, even packing material. Looks oldschool and they make custom lengths.

3.5" Round - Smooth Tube Muffler - ??" can - 24" OAL - PN# ST222422 (Polished - PN# ST222422P)

2 1/2" x 4 1/8" Oval - Smooth Oval - ??" can - 24" OAL - PN# SO222422 (Polished - PN# SO222422P)

??" Round - Chambered Round Classic Mufflers - ??" can - 30" OAL - PN# CR225225 (Polished - PN# CR225225P)



Edit: Here is the template I used for the 7" diameter Enforcer II (sry for pic orientation.) There was maybe a little over a quarter inch on either side of it.



Edit: I ended up choosing the AP Enforcer 403011S. Fits great. I'd have liked the Patriot H3015, so maybe next time.



General installation can be found on page 7 here - 2005 CompG - Fall in MN already. Almost Bedtime for Grumps.

I have a 2.5" magnaflow resonator from my other car that's practically brand new that i'd sell for pretty cheap. I think the end is cut off but it can be fixed.

Double checked part numbers, found and fixed some errors.

This search was pretty extensive to fit stock location over an 18" silencer.

Google has tons of short little 2.25" pipe diameter cans. This list shows some, if not most, of the longer options.

Think I got mine picked out.

Cheapest usually isn't the best... You want some packing in there and that cost $, lol

You also didn't list the Vibrant Ultra Quiet, one of the best, but not cheapest!

I've been kindly instructed to order a new flange piece because mine looks so bad. Suppose it might be rough/rotted enough that it can't be cut and saved, I dunno.

Apparently, the few days it would take to get here would be "too long," because running straight off the DP would be "too loud." Lol

Here's what it is anyway -

Dynomax/Walker 41806, and you'll need a couple bolts. That bolt length seems good. There's still enough room for a nut on the end.



May also need the gasket -

Dynomax/Walker 31532 or 31578. Not sure what the difference is, maybe thickness?

Please let us know where you find it, and how much? TIA

Am I the only lazy one that just drives my car to my exhaust guy and hand him green papers and say FIX IT.

AND HE DOES.