and if you are what brand are you using?

 

I'm using the Creative Compacts. It works really well and fit real well too. No noticable gains but a smoother take offs and a little less drop in rpms from shifting. I'm happy with it.

 

was it an easy mod?

 

yes my buddy did it for me in less than an hour for like 20 bucks. He said it was easy, just pulling the old one out and putting the new one in.

 

The air flow that changes with this modification will be signifigantly less than if you replace the header as well, so you may or may not notice anything... if you have the stock muffler, it's so restrictive, that the spipe changeout will hardly make any difference. But, it's definately a start.

 

I am running the megan racing s-pipe with the stock header. Fit perfect but like wedrivescions said its not goin to make much of a differance without a header.

 

I have the CC S pipe with a Injen Exhaust, I noticed a slight sound change(a deeper more full sound from inside the car) and smoother shifting. Also my car pops a little more now.

 

well i guess this might be the next step for me. i already have the trd exhaust. so i guess i will get an s pipe then i will get a header and then i will get a custom midpipe with resonator. and if i wait long enough maybe there will be an even better solution for header rasp!

 

I have the ZPI full stainless s-pipe w/ stock headers and TRD exhaust. It changed the tone of the exhaust a bit, but seems to have some helped throttle response as well. As stated before in other threads the install wasnt great, the bolts that came with kit did not fit through stock midpipe flange and overall fitment needed some playing with. Im sure ZPI has delt with these issues by now, but Im curious about that Megan Racing pipe, the finish and welds look great.

Heres 2 pix of the stock s-pipe next to the ZPI:

 

got the cc stainless......couldn't really tell a diff with my inhen exhaust. fit great though. took about 30 min for the install.

 

i think i might be interested in checking out the draxas s-pipe.