Replacing cat... Remove resonator?

[redzmonte]

So I ordered a new cat for my 3" downpipe, the small one in there isn't getting the job done.. Question now is do I remove the resonator? I know the gp resonators are a little restrictive, don't recall how good the Bonnie one is.. Who has removed it and how does it sound with stock mufflers? I have some straight 2.5" stainless in the garage and been looking for an excuse to use it...

Btw the cat I ordered is a magnaflow 99209HM round cat.. 3" in/out

[SSEiMan01]

It'll sound bad. It'll sound less bad with a glasspack in place of the rez though. Or even a midmuffler.

[00Beast]

Bonne Res isn't restrictive, just up to you how you want to change the sound...

[The_Mechanic89]

YEA 3800s unless cammed, sound like dog shyt without the resonator. also like they said the bonnie rez arent so restrictive.. mostly to dampen the pressure/pulse of the exhaust. also eliminating the 3800 rasp/pop. the only other way to remove it and still have a deep throaty exhaust that flows good would be to replace the resonator with an expansion chamber or some sort of gutted muffler and or gut the oem rez.

I do alot of custom/performance exhaust systems on peoples "race cars" i currently run 2 3/4in from down pipe to resonator. (btw ive moved the rez forward over 12in.
then from the rez theres a 2 3/4" to 3" adapter around 3in long going to a flowmaster super 44 then my own hand made 1 into 2 y pipe from single 3 1/2" to dual 2 1/2" then to 4" chrome tips a foot before the rear bumper.

[The_Mechanic89]

ive yet to hear it with my new sc3800 though.. thinking ill boost creep a bit on stock tune....

im also contemplating a electric cut out about where cat once was that re routes back into the system after the muffler and resonator for performance purposes yet still come out my dual tips

[Archon]

I've heard a fair amount of Grand Prix's around here without a resonator. It is quite obvious and does not come close to sounding good IMHO.

[1oldman]

Just curious, but from the few FWD Bonnevilles I've heard, the 92 - 99 sound better than most of the 2000 - 2005 Bonneville's I've heard. The 92 - 99 don't have a resonator. So I guess my question is, what is it about the 2000 - 2005 exhaust system that makes them need a resonator to sound better, or does it? - BC

[SSEiMan01]

The 92-93 don't have resonators, they added them in 94. The 00+ has a different routing that changes how the sound is heard at the back of the car. Much like how the 04+ GP and 06+ Lucerne sound different from any of the others, because of the way the exhaust is set up. (Personally I like the stock tone of the newer ones better but that's my opinion.)

[nos4blood70]

The new gens(L26/L32) sound pretty meaty stock. I dig it.

[M90power]

deleting the Res is going to make your car raspy and isnt going to help. dont remove it unless its leaking or rusty

[redzmonte]

left it in.

[ga93sle]

The new gens(L26/L32) sound pretty meaty stock. I dig it.

IMO, my GP SE L26 with single exhaust sounded wayyyy better than my brother's GT L26, something about the GP GT exhaust just doesn't sound right...

[SSEiMan01]

It sounds better with the L32 Chris. My friend has a L32 07 GT. The Lucerne single exhaust sounds good too. Carl noticed that when I took him downtown in my gram's a while back.

[ga93sle]

It sounds better with the L32 Chris. My friend has a L32 07 GT. The Lucerne single exhaust sounds good too. Carl noticed that when I took him downtown in my gram's a while back.

I'm yet to hear an L32, but L26 to L26, my single exhaust was better lol.