husky100

I just installedaxle back flowmaster cans on my sisters 07 GT.I noticed a louder sound however not by much. I have been reading alot of posts on this site as I am new to it, and still have not found if installing an x, or h pipe will cause the car to show engine codes. I noticed the 02 sensor in the cats and does cause me some concern. She would like the car louder but with no engine codes. I read tacobills write up on installation and found it to suit my needs.

blackS197

if you get a xpype you should get your ecu tuned.

torque240

I had the flowmasters too, went with a bullet type muffler (frpp/borla stingers, slp powerflo, corsa) and it is a nice deep loud, but not redneck truck with only headers loud. If you do an off road mid pipe you can get mil eliminators at brenspeed to stop the engine light or you can just get a tuner which is what i would recommend, get rid of throttle lag, pick up a few ponies, and stop engine lights.

reeflover

Putting a X pipe and cold air with a re-tune will be like night and day. Thats what you should do if you got the money.

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blackS197

I say sell your exhaust and get some SLPs if you dont want to mess with an xpype.

cefiro80

That sounds like the best solution for the situation.

retfr8flyr

Sell the Flow's and get a set of Boomtubes. The Boomtubes will give you the sound you're looking for with out being too loud.

Earl

husky100

Too loud is not an issue. What is involved in the retune?? I am old school and run old school style parts, only with alcohol.

onederful100

the retune involves a hand held tuner to turn off the rear O2 sensors which cause the OBD II trouble codes when removing cats. removing the cats will make it louder with the same tone you have now. but if you want more loud try boomtubes. you can also install some LT's and that will make it even louder

sweetlou69

get an Offroad H or X pipe and just get the MIL elmininators and itll sound siiiiiiiick and with the MILS you wont throw codes.