looking at this and thinking if it'll make more power over the other brands that offer 4-2-1.

piping = 48.5mm
collector = 60.5mm

i mean the piping looks big, and it goes to the very end before it goes to collector. what do you guys all think?

 

bump!

 

i don't know but that monster looks like a PIA to install....

 

i66, are you SC? If not, what does this have to do with FI?

 

I've never heard of Maxim let alone that header. Only one way to find out...

 

Those flat collectors are know to produce much less power than a normal collector.

 

Install is a Breeze...I have it but i think that It needs Tuning For it to gain Anything...Out of the box....Also the Sound of the exhaust will change totally...in Idle or to 3k will sound like you are driving a Boxer Motor..more later...How did you get it if that's not a secret?Its Super Rare and very expensive. I assume you got it Second hand?
http://www.putfile.com/stefce/images/64143

I think that Midrange Gain is just small but would expect bigger Top gain..
That nasty drone from 3-4k from OEM testpipe and catback is now gone.;

Took some Measurements my self before the install and the header was 7mm wider on every account- WxH on the intake runners and the collector compared to OEM

Cheers and some super Rare and Great JDM Header

 

i know a friend in japan who can get this header, and yes is very rare and expensive!

so did you feel a different in power or did you went to dyno to see if there is a power difference? coz it looks to me this is the only 4-1 header that will actually make power with the big tubings. but i don't know if is worth the money to buy it, if it doesn't have much gains. hope you can provide me with more info and review of this header.