Post GIAC installing exhausts.

I know most don't believe in performance from ECU upgrades and Intake upgrades but humor me in regards to the following question. I have the GIAC and EVO intake, if I get an exhaust do I have to go back to have my ECU reprogrammed?

I would think only if you did an exhaust by-pass would you need to. Otherwise, no. My $.02

I believe the ecu has the capability to adjust(learning ecu)

Funny you asked. I recently had my ECU re-mapped by evoms. I also have their v-flow prior to the ecu. I spoke to Todd at evoms and he told me that the ecu does not require to be re-mapped if you up-grade the exhaust. The ecu however needs some time to learn the new exhaust in order for you to recieve the benefits from the exhaust. I recently installed Fabspeed mufflers and headers and the combination of all their parts is great!

do you feel any difference in terms of performance, feel, etc..... if you were to do it again..... would you?

In response to Porsche Smile: This question is often asked...and most folks who have done what you did or intend to do....respond with the unscientific "it feels so much faster, better, more responsive....etc". I had mine flashed with the GIAC flash, EVOMS intake, performance headers and mufflers....and the literature I've read states that you'll pick up somewhere around 18-30 HP. After I had mine done, I (like so many of the other folks who didn't dyno before and after) ....definitely noticed improved acceleration and performance. Some of the "noticeable performance" comes from the more aggressive sound you get from the EVOMS cool air intake during acceleration.....and from my perspective, the money was well worth the investment in the mods. If you're looking for concurrence or justification....I don't think you'll find too many folks who have done it who will say that it's not worth it. My only regret was that I installed Schnell mufflers....and in retrospect, I would have liked to have installed mufflers that were just a bit more robust and throaty....something along the lines of perhaps the GHL. Brian at GHL is offering Rennlist folks a deal on the mufflers thru the end of January .....I'm seriously considering it. Bottom line...yes, it was worth it....but I think an actual HP increase would require you to do the GIAC flash, Cool Air Intake, mufflers, and headers.

Chuck..... you're the first who has given an answer worth thanking..... that's all i wanted to hear.......

I don't "feel anything". You will not feel much of anything when HP increases by 15hp to the wheels. You will see it on the dyno and when racing against a stock 996, quite clearly. If you want to feel something check into Forced Induction. And yes, I would do it again.

thanks washington.... i don't think the meaning of "feel anything" is the issue as much .... i know 15hp compared to 300 is minuscue....... but i wanted to know is how much smoother, how much better is the drive to validate the $1K price tag....... but looks like those who likes it, LIKES IT, and those who don't thinks it's okay.......