Jason240z

I hope for you it does fit. you 1000% have the old style header and new style for the rest. Fujitsubo say that they're not compatible? They do not say that any of their's worth with LHD cars, they just say its for r180 diffs. If you check the number thats lazer etched on the manifold it'll tell you the part number. then check the fujitsubo site. " It is not compatible with mounting Allowed genuine EX Mani and Super EX (510-15036) only when combined with safety standards compatible product 2-seater-only Super EX (510-15035). Remarks There is a case where every old car caused the part processing at the time of mounting. Costs and claims, etc. in that case can not respond at all. Detailed data is super EX (510-15035) is mounted state.

Top Picture. Then the second for comparisson. Whats the part number thats cut into the manifold?

Look at the pics that Alan put up from the magazine, you see the new version on the left, older on the right..... Look at the first pipe.

I'm afraid to say it is.

isn't that the old type header?

Lovely pictures Kats.

I think this is what you should get

Did you not get the instructions books/manual etc from your supplier?

You’ve bought part of a well developed system.... just buy the other part.

‘Whitehead performance’

Sean, that’s the fujitsubo pics. By shortty, he means the little adapter whp sell(not fujitsubo) looks like it was welded by one eyed willy

Vibration fatigue cracks/breakages I guess

So quite simply they were fitting an exhaust that is documented my fujitsubo not to fit. just shows their actual level of understanding about what they fit to cars. It’s not for big diffs.

what size primaries did you go for?

Was it the new or old version? What size diff did they have? What car was it being fitted to?

With all respect to those on the thread, that thread doesn't constitute 'the answer'. The fact that Nissan and numerous factories did it back in the day, bmw did with with most of their IL6's, maclaren's v12 did double that when it was after all out weight savings etc. Its not as black and white as a 3 page thread.

There has to be a performance variable, a decent one or factories wouldn't design systems like that, which seem common on IL6 engined cars. Pleased to see you're happy with the Spirit Garage system, its a good looking system, nice to see one that follows a factory'esq route.

Couldn't he wait for such a vital part?

Looking at comparison graphs, it’s a lot lower, percentage wise. Designed as a full system. Most power comes from a manifold and Center section

The old ‘low power’ one.

Thanks Alan. Looks like the whole thing is new.

It’s not my bag ?

What’s that got to do with fujitsubo?

Sean, what you should do is spend a few days on a dyno, comparing your systems, trying size of pipe work and routing types with mock setups, see what works where and why. and yes, noise as measured can lower at higher rpm, as proven by noise testers ?

Yes, totally, I had a 749r that made more noise on track side tests at 7000rpn than it did at 8500rpm. Stuff I don’t under stand, resonant frequency/harmonics etc etc. no they’ve not said where the improvement comes, They’re hardly going to give you a ‘how to guide’.