kos11-12

Looks great but I doubt you get this power figure, without a proper ECU , bigger capacity injectors and a proper remap on a dyno, I suspect you lose power with a down pipe diameter over
1 5/8 ,
Hayward& Scoot in UK make a good system too

PAOLOP

M&M headers (and many others) are 2,5"

RaceDevelopments

I can tell you, from personal extensive dyno experience with these cars, that a dual 2.5" exhaust is completely unnecessary and will hurt torque. A nine nine six, or better yet, nine nine SEVEN GT3 does not need a dual 2.5" exhaust. If you find that dual 2.5" makes power on the dyno, chances are you have too much of a restriction somewhere downstream of the header.

minhnugen

This system is not a dual out. It's a single out...which I've always preferred on a narrow body non-turbo car.

minhnugen

Here's a couple of more shots before it's going on the car.

PAOLOP

I'm not an exhaust's expert. Can someone help me and explain this?
I know that the torque is conditioned mainly by the length of the headers. In Europe almost all headers are 63.5 mm diameter (no outlets)

crg53

Gentlemen, there is no way those header pipes are 2.5" in diameter. Take a look at the flanges, the 2 mounting holes have a centre to centre measure of 2.600", so relate that to the pipe OD. My guess is, that the collectors are 2.5", but definitely NOT the header pipes.
PS. Very nice looking exhaust, and please fill us in on all the detail as in sound and installation.

kos11-12

You are right , maybe 44 mm , the length seams to be find...
who knows what difference dual or single outlet makes, lose top and gaining torque ...?!

davidwilson11

Looks good, following this with interest. Mucho interest

davidwilson11

Meant to ask, did it take long to get delivery?

minhnugen

They had to build the system from scratch...I don't think they have them stock pile and only build them as they're ordered. So from the time I order to the time I received is almost a month. It comes in two boxes and made me felt like a child again when I saw them at my door steps.

hockenheimr

What was the price? $USD 4,000 + Shipping? thx

minhnugen

It was $4100 shipped. Pricey I know....

hockenheimr

A bit pricey but not too far off.....I think the major question is 'does it work'? I have some real doubts about the heat exchangers being so far down the line and then re-sending the heat all the back and thus actually working.

I like the build, the sound, added hp, and one-sided round tip.

Also, if something goes wrong it's probably going to be a costly head-ache.

I don't think I'd be a buyer at this point.

PAOLOP

European headers 2.5" : I'm wrong!!! Sorry!!