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06-08-2013
I have a stock 2008 GXP. What suggestions do you all have for new mufflers that will give it more of an aggressive sound? I know there have been various threads on this topic, but I am just looking for a straight forward answer. Something simple that I can have done quick and a muffler shop. Flowmaster? Magnaflow? Other? What model and size? I have been on youtube and played a bit on there, but that only confused me more. So many choices. Also, thought on air intakes? Thanks.
06-09-2013
I've got magnaflow mufflers on mine now. They sound pretty nice but if you want to UNLEASH the beast within then i'd suggest str8 pipes or glasspacks like some of these people do. I was possibly going to chop my ****ty welded mufflers off and go glasspack.
If you're looking at intakes go for Cold Air Induction System for Grand Prix GXP - PFYC.com
06-09-2013
Check out YouTube. Straight pipes sound pretty good on Gxp's
06-09-2013
Once you do all that.......sell me the stock tips!
06-09-2013
Cutout
06-09-2013
Magnaflows usually are a bit on the quiet side, but definitely louder than stock. Especially wide open. That's where I'd go.
On the intake, I got a decent setup for my 08 gxp on eBay for $55 shipped.
06-11-2013
I'll be cutting off my mufflers soon. Then depending how I like it, I might cut out the res also.
06-11-2013
Might sound okay. Will sound better than a 3.8. Yeah I would just look around on Youtube and see what sound you like.
Originally Posted by The Sunfire Guy
06-11-2013
v8=straight pipes
06-11-2013
If you're a doosh.
06-11-2013
Hooker Max-Flows
01-01-2014
Cocor,
I cut off my mufflers but left the resonator and it made very little difference in volume. Next, I replaced the resonator with a Thrush glasspack (still no mufflers) sounds great but very loud inside. I'm thinking of adding either a set of Dynomax Super Turbos or, if you still have your factory mufflers, I'd be interested in buying them from you. I'm thinking the glasspack with some muffling may be just the ticket.
cc
Last edited by ccrane; 01-01-2014 at 04:58 PM. Reason: Forgot to quote who I responded to.
01-01-2014
^This
01-01-2014
http://www.grandprixforums.net/showthread.php?t=84921 <--------------look here
01-02-2014
Thanks 91 but sorry I'm looking to quiet it down. I already have a 36" glasspack with straight pipes, now I'm going to add free flowing mufflers. It's either that or line the trunk with Lizard Skin.
cc
01-02-2014
i threw them away.. Were a little used. ;P
Cut em out, left the res in and put on new tips.
http://youtu.be/13nHOYGk88M
01-02-2014
We have the same setup, and even when you add straight through free flowing mufflers of any type it won't be much quieter , I have the 36" glasspack as well.
01-02-2014
So, spray the trunk with Lizard Skin or line it with Hushmat it is. May as well fill the spare tire holder since the "spare" leaked sealant all over the place anyway and the inflator doesn't work either.
cc
01-22-2014
My exhaust looks stock, but sounds like a beast! As much as I would love to keep it like this and piss off the neighbors or anyone else within a 100 feet I have to fix it. I think my mufflers have holes in them but wont be able to tell till I can get under neath them or drop them. I dont feel anything coming out of my mufflers so I assume they are swiss cheese on top. I like the magnaflow sound, but at the same time I dont want to kill the kids riding in the back seat. I like the fact I have no spare tire and might coat it with lizard skin back there. Lots of great ideas, thanks!
01-25-2014
I was in a straight piped GXP last fall for a tune (no cat, no res, no mufflers), needed Tylenol at the end, sounded great for the first couple of minutes though.
Run a Magnaflow 12641 in the resonator area and even with straightpipes in back the exhaust tone will still be fairly loud but won't be raspy and you'll have very little to no drone http://www.magnaflow.com/02product/s...=main&id=11455
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