Rule of thumb is 10 degree reduction in intake temp gets 1% increase in HP.

With the Y Pipe? Really? Link???

Nissan 370Z 09-10 Top Speed Catback Exhaust System - eBay (item 390255982283 end time Dec-24-10 05:21:14 PST)
$467

Nissan 370Z Z34 G37 VQ37 08-10 Exhaust Y-Pipe, Y Pipe - eBay (item 230498398242 end time Dec-09-10 12:15:10 PST)
$195

Total = $662

Invidia Geminii for 850 shipped:
Invidia NISSAN 09-UP 370Z GEMINI SINGLE LAYER TITANIUM TIPS CAT-BACK , 370 exhaust, 370z catback exhaust, 370 performance exhaust

Im just saying, I remember seeing the topspeed for around 500 total and it seems out of no where the price jumped up.

This is what happens when more and more people start buying it. they start to raise prices.

hrmm i'll ask about it.

I am planning on buying this set up with the Y pipe here in the next few days. I also have some Berk HFC's that I havn't installed yet. But I also have installed Stillen headers. Do you think I will have any fitment issues? Thanks

not sure,, but there is only one way to find out,,,,

Thats true...I ordered the Top Speed exhaust today, but I havn't had much luck in finding a magic y pipe....but I will let you guys know how it all works out may take a few weeks before I will be able to piece it all together....

Seems like a debate....but how much of a difference do you think there is between the JIC and the top speed Y pipe? I hate to settle, but if I can't find a JIC then I will purchase the TS....I don't like some of the bends on the TS, but do you really think it will matter that much?

alt370z...dont you have the TS Y pipe? and you made those gains with that one correct?

Anyone who has/or is ordering this exhaust care to weigh it?

From my email from the sender, Fedex has it weighting in at 57 lbs for both the CBE, and the Y pipe, I'm not sure how much of that will be packaging, but that atleast gives you an idea....

By picking it up both myself before, it was def. lighter then factory exhaust .

i kinda wish i didnt buy the stillen exhaust, i over payed for it, and it doesnt sound as nice as some systems out there.

Are these gains with the catback and Y pipe only ???? or the test pipes are also included on the dyno.

Factory cats, but I think I know what happened.

I bet the base line run didn't reflect giving the ECU enough time to adjust to the K&N filters (takes 3-5 runs for the ECU to adjust), which he claims to have also had installed in both runs.

So... my guess is that the baseline should be interpreted as "without K&N's" (even tho' they were installed) and the second run should be interpreted as "K&N filters + CBE" -- that is a more likely explantion for that big gain in power.