Neccowafer

i have magnapacks welded into the stock exhaust. Got car back today after installing gears and the UPR xpipe with cats.....sh%t is pretty loud.

racer02GTstang

i have a offroad x, long tubes, and borla stingers.... also heads,cams,blower.. so it will be pretty damn loud im guessing.. the cams made the car louder, and so did the blower under rpms with boost (more air going through exhuast)

SVTBill

give the mufflers a couple days to "Blow through" or open up...you just wait

jt01gt

Durr 727, ill give it 2 u, thats the best sounding v-6's Ive heard.

Tylus

hear hear, I love the Magnaflows on my truck.

to the thread originator, what do you mean by the magnaflow mufflers you put on sound like stock? my stock exhaust is beyond quiet. was your stock exhaust quiet?

2000GT4.6

If you remove the rear cats without using a MIL eliminator or a tuner to turn them off the CEL WILL light up, its only a matter of time.

The rear 02 sensors are only inplace for one reason... to make sure the cats are working.

As I said before, try some dumps. They are really cheap, but if you don't want to pay before you try em just crawl under the car and pull the rear pipes off the mufflers, then try driving around. My car is still fairly quiet inside at cruise but louder at idle and way louder at WOT.

blownslt

[quote]ORIGINAL: 2000GT4.6







If you remove the rear cats without using a MIL eliminator or a tuner to turn them off the CEL WILL light up, its only a matter of time.

firstonraceday96

its cus your car has 6 cats take thoes ****ERS out.

blownslt

The car blownbayou is refering to is my 03 GT.. we had the rear cats cut out after putting 40 series flows on...Made a night and day difference. Thats been 2 years ago, no CEL, so how many more years before the light comes on??? The o2 sensors are on the car to provide the computer with feedback on the fuel to air mixture. They sense the oxygen in the exhaust stream and send a signal (voltage signal in millvolts I think) to the computer to make the proper adjustments. The cats just clean up the exhaust gases for emission purposes....

TOOT

First it was suggested I do so buy the muffler shop that welded in my exhaust after I suggested that the after market add ons didn't make the exhaust as loud as I wanted.

It's a fact, Ichanged the tip on a lx, 5.0 after removing the stock mid piping and welding in high flows with Flowmaster muffs (regular shifting and down shifting set off car alarms),and on the 02 gt changed the tips after welding in the catted x and packs for a more aggressive tone.

The Pack's cat back come with 3.5 tips its for more than just looks.