Rmtmusic

Hey, so i have a 2007 mustang gt. Currently i have stock everything except i got a muffler delete. (Straight piped) (still have cats)

i want a louder set up. ( Doesn't really sound loud to me, in the higher Rpms it sounds really quite) In my understanding Straight pipe will always be louder than any exhaust? So if i would just get some slp loudmouths for example it would just have a deeper tone , but not louder correct? thats my first question.


A guy recommended me i get an X pipe with Cats ( i live in Cali) Is there some type of easy replaceable cats or idea to get them installed again when smog is due? any ideas?

Last question is it really louder to take of cats? ( i want to know if its worth it) or will the X pipe get me the louder raspier tone i want.

Granatelli Sales

We offer a complete 3" exhaust system with an off road X-pipe for your 2007 GT. We would be happy to offer you a deep discount on our exhaust system since you are a forum member. Please PM us for a price.

http://granatellimotorsports.com/pro...tems-14-0.html

Rmtmusic

seems a bit tooo pricey for me, considering its basically just a straight pipe with an X pipe correct?

Tom Boismier

Sigh.

http://www.vroombox.com/

danzcool

Exhaust cutouts will be louder also. I'd be careful about getting too loud, you don't want to attract the boys in blue.

jwog666

you want loud? here it is. but seriously on a street car if straight pipe isnt loud enough, you may have a hearing problem.

2007CalSpec

If you're going from a stock catted H-pipe to an X-pipe, it won't be that much louder. I barely noticed a difference when I switched to an X-pipe. I ran with an off-road prochamber for 6 yrs until I had to smog the car. It was loud and I got a lot of thumbs up. Cops never bothered me but then again I would let off the throttle when I drove by them. I now have stock cats, Pypes X-pipe and Borla S-types. It's not loud enough for me since putting cats back on so I plan to cut the "off-road" downpipe from my prochamber to install high flow cats I recently purchased and mating that to my X-pipe. This should increase the volume and prevent the stinky exhaust smell from going full off-road again. I plan to swap it back out for my stock cats come smog time.

A 3" system? Pretty cool. I would love to switch to a 3" system since I'm blown but I can't see myself switching out everything from the downpipe to the mufflers when it comes time to smog since the stock system has 2.5" pipes. Removing the over-axle pipes in itself is a pain in the butt. Now if only the downpipe portion of the Granetelli system is 2.5", before it increases to 3", then I would be able to swap it out for my 2.5" stock catted downpipe section. That would be ideal. One can only wish.

EDIT: On second thought, looking at the Granatelli off-road downpipe, the end where it angles into the X portion doesn't match my stock catted downpipe so it won't work anyway. Oh well.

I have some QTP cutouts but I can't decide where to install them. Space is limited on our cars. Mine are the standard ones and not the low profile oval ones they have.

elDuderino

Looks like Granatelli was offering a special discounted price if you PM them or call them. Might want to see what they are offering before you decide it is too expensive.

Granatelli Sales

Please PM us or call us for your discounted price, it is too low to post on the forum!

ghunt

FWIW there's a big sound difference between stock cats and high flow cats. If I remember later I will link to the videos of my car with stock cats and MBRP axle back, and Magnaflow catted X pipe with the same axle back. Big difference in volume.