olszowa12

So I changed my exhaust setup today from straight pipes to Mike’s H-pipe (powerpipe). I took two videos before and after; both videos taken from the same distance, in the same place with the same camera.

I had one hiccup during the install though – it turned out that both of my primary cats were detached/broken it two pieces and they were only held by 3 screws I have never seen anything like it. The guys at the exhaust shop welded the cats and told me that if I don't get any CEL then it should be all good.

I don’t know if it’s a placebo effect or the broken primary cats made the car slower or Mike’s H-pipe is better than my previous setup, but the car feels much much faster, especially in the lower RPM. It pulls much stronger from 2000rpm.

As to the sound, I think straight pipes sound better than a H-pipe but I am happy I made the change, because I got really bored with the straight pipe sound.

Maverick1975

Its amazing what a small little piece of pipe can do to change the sound out of this car. I found H-Pipe a good way to remove the raspiness of long tube headers

abcut973

Interesting! For sure straight pipes are louder.

kgmuse

both sound great, I I'm leaning towards a H pipe myself. just makes me sad that we don't get estates in the us.

awasak17

sounds amazing!

shades

I got the exact same setup and I know what your talking about. Double straight is loud but mike's H pipe hits the spot just nice. I also noticed that after having them on for awhile the sound got a little louder and more refined. Or it might be just my imagination...lol

glovemoney

Just installed mikes straight pipes and WOW! Amazing sound, better than I expected and needless to say much better in person vs video!

Swamyg1

Did you just add the H to your straight pipe? Or is this an entirely new H-pipe that replaces your straight pipe?

olszowa12

In your exhaust you have a 2nd cat and a resonator. The resonator has a small H-pipe built into iy.
Now by replacing your 2nd cat with either a straight pipe or H-pipe, you can change the sound.

At the moment, I have a H-pipe + stock resonator (so double H-pipe).
So I replaced my old straight pipes with Mike's H-pipe.

C63Analyst

Does leaving the resonator in cure some the raspy sound of the straight pipes?

olszowa12

Yes, it does.
Do you have a full straight-pipe setup with 2nd cat delete and resonator delete?

avery.whss

Matt...I ordered some straight pipes from mike...Anyways...when I get it installed should I tell them to leave the res and just delete the 2nd cat?

olszowa12

Yes, that's what the pipes from Mike do. There is no other way but to delete the 2nd cats and leave the resonators in place.

BTW I saw that the package was delivered today - all good?

avery.whss

Showed up this morning...another set of quality pieces ..going to install the paddles this weekend..the shifter took <5 minutes to swap ...time for the steering wheel...soon

C63Analyst

I haven't changed the exhaust at all, having trouble deciding if I should keep the resonators or not...

olszowa12

Looks great Avery. Perfect match with your OEM CF interior

I would say keep the resonators. If it's not loud enough for you, get rid of them then.