Kakimoto 3" Exhaust, Keep It Or Upgrade It?

[Sayajin]

Hey guys. When I purchased my GTR33 it came with a Kakimoto 3" Cat back exhaust. I am shooting for about 700-750WHP when I am done with my R33. Now I of course realize that I also now need to upgrade my downpipe which appears to be stock size or very close to it. However my real question it this.

I have been told that Kakimoto makes 2 different kinds of 3" exhaust, a racing one and an every day one. I am told I have the every day one. Is this true? Are there 2 different types? My exhuast appears to be 3 inches from the cat back, has manderal bends, a resonator, cat and muffler. Now I am used to running straight 3" pipe with only a muffler so I would of course remove the cat, but I was unsure about the other stuff. Is mine a decent 3" or would a different 3" be necessary?

I have also heard that a 3.5in exhaust is ideal for a GTR33 especially with my power goals, so would a 3.5in make a signifigant difference?

I guess I am just trying to find out if my 3in Kakimoto catback exhaust (as I said I would also upgrade Down Pipe) is sufficent for my 700-750WHP street car, or If I need to upgrade to a different 3" exhaust or even a 3.5". Thanks guys.

-Sayajin

[cheez]

hey if u decide to upgrade the exhaust and gonna get rid of the kakimoto 1 let me know as i would be interested in purchasing it off you.

cheers

[T04GTR]

is it a regu series? (roll back tip on the mufler?

[ronnydotk]

if it has a cat, ressy and a muffler then i wouldn't think it be a racing exhaust.

700awhp is a big figure.... i would have though 4" straight through would be more what you needed.

remember: (theoretically) turbocharged cars shouldn't run exhaust because turbos hate back pressure. whereas atmo engine need some back pressure to make low/mid range torque.

if i was aiming for 700hp at all wheels (which is about 525kW) then i would rather a bigger than neccesary exhaust than having the engine choking because it cant get rid of its exhaust gasses quick enough.

is the car going to be driven (or attempted to be driven) on the road? if so then you will be restricted as to how open you can have your exhaust. if its gonna be a track car then just go big! you dont need to worry about mufflers for the track.

so in conclusion, i would upgrade your exhaust.

if its going to be a track car then get 4" or close to pipe with no muffler or maybe just a ressy.

but if its going to stay on the road then keep the 3" and just get rid of the ressy and cat (but you run the risk of gettin a little yellow sticker if you do that)

hope this helps

[JaiJai]

I have a kakimoto and theyre just excellent wouldnt know why youd wanna get rid of it....and thats a large figure to be chasing! my advice would be keep it for now and see how you go if you need to upgrade well then do so but up until then id keep it theyre a rare thing over here