I just ordered a new exhaust (Borla) and the ztube/pop combo. How much of an increase in HP would you think I will be getting (once the ECU is happy) ? If you figure stock it gets 280 at the crank, what do you think it is now, at both crank and at the wheel?

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2004 G35 Coupe - 5AT - Black Obsidian / Willow - 20% Tint - Premium Pkg - Borla Exhaust - JWT POP/Z Tube - Clear Corners - PIAA LEDs - Aluminum Pedals

 

anybody?

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2004 G35 Coupe - 5AT - Black Obsidian / Willow - 20% Tint - Premium Pkg - Borla Exhaust - JWT POP/Z Tube - Clear Corners - PIAA LEDs - Aluminum Pedals

 

I'd say @ 295 to 297HP

2003.5 5AT
Premium Package
Tire/Wheel Package
K&N Filter, Z-Tube, EGK

 

I wouldn't be suprised if you got no more than 10 WHP from the combination of mods. Not that the exhaust and z-tube combo you bought isn't great; it just seems the stock exhaust as well as the stock intake box were designed quite well from the factory. Free up your cats and maybe buy a new plenum and you might see more considerable gains (thats if you go the NA route)....

 

I agree with bought. If you want more considerable gain, get a pair of high flow cats or test pipes.

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Borla exhaust, Nismo sway bar, Z duct, JWT p/c, Kinetix cats [img]/w3timages/icons/laugh.gif[/img]

 

wat do u mean high flow cats ? does the injen use them?

 

I don't know the gains from exhaust, but the ztube/popcharger is a great combo for the money to rwhp increase ratio.

Black / Black 2004 GcoupeMT. Premium. Splash Guardz.