Motowerkz

Go to GP Exhaust Group Buy for the 05-06 and 07-08 ZX6R for more information.

leanmeankawi

Neat exhaust just worried about back pressure issues, any one have any opinions on this...

NickySixx3Sixx

Works very well with the stock header in place.

Motowerkz

We've done our homework; no issues to speak of with our exhausts.

There is a lot more negative connotations associated to the term "back-pressure"(bp) or the lack there of, then positive ones. This is due to most people not really knowing or understanding what the term "BP" means. BP is defined as the force exerted on a moving gas or fluid by obstructions or tight bends against its direction of flow. BP is normally stated in PSI or inches of water.

I've heard people say "Without back-pressure, I will lose HP and my engine will get ruined" WRONG. If your engine was a two-stroke then a negative outcome is possible. Four stroke engines work on a few common principles, the need to get air/fuel to and from the combustion chamber(CC), provide an ignition source, create a strong power stroke to revolve the crankshaft(compressing the fuel/air into a very small space increases the efficiency of the power stroke) and scavenging(removing burnt air/fuel from the CC). Ultimately the more air/fuel that can pass through the engine, the more power it will make. Volumetric efficiency(VE) is another dictator in overall engine performance. Porting, bigger valves, mutiple valves or adding a turbo or supercharger can all help in adding to the VE of any given engine.

Must sleep now...........

flaming06

there was a long post of arguments about someone saying this pipe made their bike run like crap. I've been running it for a while with their map they supply and have had zero problems. Bike runs just fine. Only thing I had happen was the baffle rattled loose.