Bleh that's not true nobody I've heard of ever had a warranty claim denied for a simple muffler. Now if they went turbo back exhaust with the downpipe that's another story.

 

Is that the only Mitsu in your area? The dealer I go honors the warranty even with full bolt ons and tune. They even called to ask if I had a tune so they wouldn't over write it with the ECU update.

 

Leith Mitsubishi was, but they closed down.

 

So you didn't actually baseline YOUR car at the same time. There is no way you can reasonably claim a 15 hp gain then. Just because other cars baseline different numbers under different conditions.

 

I didn't claim 15 I said between 10-15 hp. Because a stock EVO won't dyno more than 230 under any condition, unicorn or not. Mine put down 240 stock, with the only change being the intake. So I gave a +/- range which I think is reasonable.

The tuner had no other way to account for the discrepancy in my baseline dyno. They have tuned hundreds of EVO's, so I just took them at their word when I saw the abnormally high baseline.

Also, as mentioned, the gain was noticeable when I put it in without a proper tune. Not like 'fooling myself seat of the pants', but a legit increase in power throughout the band as well as clearing up a stumble I had at the higher RPM band.

I have no reason to claim gains, I really don't care about HP numbers or anything like it. I was only relaying my personal experience, and I trust my tuner, Kozmic Motorsports, to not blow smoke up my ***. They nicknamed their dyno the heart breaker I think for the reason that they try and be as accurate as possible when working on cars.