Straight pipe rules!!!!

[Cobb]

First time I posted of my exhaust mod I got a lot of smart responses. Ive decided to spill the beans. Its nothing more than some pipe welded together with a tip out the rear. Straight pipe does wonders for economy and really brings up the bottom end. It remove the labored feeling the i2 gives you at lower speeds and small hills/grades. It also serves as a reminder to back off the throttle.

Whats interesting is that if you are coasting or braking you can hear the same pulsing like its moving air through the system. I thought hte valves are closed when its not pushing the car? In EV mode it does not make that noise.

If you look at tanabe, those are just straight pipes with an attempt at a glass pack at the end. The glass pack makes more of a throaty sound. Its not that loud at all and matches me geo. A few guys on here have done the same, one has added a dual tip.

[Stone]

Most interesting! Pics?

[ski1297]

Would love to see some pics. I am always down for some modification.

[Cobb]

Ill see if I can jack it up to get a photo. Basically I cut the pipe an inch from behind the oem muffler, then used some pipe from a local auto store and welded up a pipe to stick out the back with a chrome tip using the oem hangers.

Its still rather quiet, but less than 40 bucks I got a new "muffler" vs the 500 bucks tanabe wants.

[maximrick]

you said it does 'wonders' for economy ... what differences have you seen before and after??


also like others mentioned pics would be much appreciated.

[cheesie]

yeah pics and knowing bout the wonders would be nice

[RedrumedInsight]

So you left the oem muffler and ran the pipe from there?

[RedrumedInsight]

So from what I grasp you just took this muffler out replaced it with straight pipe to eliminate it from snaking back on itself?

[Cobb]

Not exactly. I cut the pipe off the rear of the muffler where it connects to the cars exhaust. Then welded up 2 more pieces of pipe and cut it at an angle so it positions correctly out the rear of the car. Then slipped a chrome tip over it once it was held by the original supports and a piece of welded up scrap metal.

I cant tell of any mpg improvements, just more low end. Unless I use sport mode, even under heavy acceleration I seldom pass 3 grand.

[Willie Williford]

I'm assuming the G2 has the folowing parts in the exhaust system. (Similar to the G1)
1 pre cat, 1 post cat, 1 resinator, 1 muffler.
Since 2003 there are a few G1's with my "DE WORM" exhausts.
You simply remove the last muffler, connect a pipe (With or without curves) running the exhaust gases directly from the resinator out to the back of the car. You lose the weight of the muffler, the sound is better, and it works for torque.
(You lose the worm at the end of the exhaust)
The resinator absorbs most of the exhaust sound.
HTH
Willie