Mongo

anyone have the URL to the OTT X-pipe's website? Last time I remember finding it, it was still under construction....is it up yet??? is OTT a Rennlister???

Andy

Tony

http://www.performance928.com/


isnt the list great!

Gretch

OLD, I have the 89 GT stock exhaust with the RMB. It is on the fuzzy edge of loud. My inspection resulted in the car being put on the lift to look the exhaust system over....It passed, but I would have been bounced with no cats.....On top of the fact that I cannot believe that I would find the noise tolerable if it was any louder. Under WOT it wakes the dead.......

Mongo

thanks for the link Tony, I think I'll make my inquirement on a pipe to help contribute to the EPA's irritability...

Andy

pappy92651

You could install an X pipe with CATs. It would not cost that much more and the HP loss is almost negligable if high flow CATs are used (Random Technology shown). By ceramic coating the X pipe the heat from the exhaust will make it to the CATs and they will operate efficiently.

Mongo

what's the diameter of the OTT X-pipe? is it 2 1/4" like the factory???? I wanna get one but like to keep my secondary mufflers and incorporate the RMB still.

stuartph

Stig

Diameter is 2.5"


Stuart

GT UK

Mongo

damn, is the x-pipe reduced on both sides to 2 1/4" to connect evenly to the factory pipes?

stuartph

Stig


The factory pipes slip inside the x pipe and then you clamp them and it is a good fit.


Stuart

GT UK

pappy92651

That follows. The ID is ~ 2 3/8", the OD is 2 1/2", so a 2 1/4" OD will fit inside the slip joints on the X pipe.

drnick

is there any concensus on which is the best muffler to replace the stock intermediates, for sound quality? (in combination with a RMB)

Mongo

wow I really really want an x-pipe now and with a 928 Intl. RMB I can't wait to wake the neighbors! Kinda like a rooster at about 9:30 at night...and about 928 of them.

pappy92651

I will be running Bullet Mufflers, p/n 212161, because they fit on 2.5" pipe, fit under the car, and flow well. The 2.5" pipes will go all the way out to the rear of the car. All pipes will be ceramic coated prior to the final installation. I understand that these mufflers produce lower frequencies and not the high frequency tinny rapping type of sound.

pappy92651

Bullet muffler pictures (attached)

Thaddeus

Hm... my X-pipe came without gaskets (no surprise really). Can I fabricate some out of exhaust gasket stock? Which thickness should I use? Or is there a special Porsche gasket that I MUST use for some quasi-mystical reason?

Thanks in advance...