what pipes would give a yfz 450 the most HP gain or which would you recamend(or how ever you spell it)

 

Well, in response to your question I refer to the August 2004 edition of Dirtwheels where they printed the results of their pipe shootout for the YFZ 450. However, there is some bias in this article because several pipes were not included in the shotout for various reasons. I should also mention that this shootout did not include full systems, but slip-ons only, with only carb and airbox mods.

Here are some of the results:
The Dubach Racing slip-on made the most horsepower with 47.1 at 8300 rpm. Next is the DG pipe with 47 hp at 9250 rpm. So it takes longer to produce the power. Next you have several pipes with 46.5 hp and up, including the Big Gun, GYTR, HMF and FMF. But some pipes take longer than others to produce the power, and also their power curves are different. Some are strong on the bottom and others wait to build their power. I would reference this issue before you make your decision, if you are that serious.

 

curtis sparks all the way........

 

i was just at a ct racing site and their dyno with a pipe kit gave the yfz 48.0 HP at 9.02 RPM does any one know anything about ct racing or better pipes

 

I have seen a couple YFZs with ct pipes. I saw one at Silver Lake last summer that was ripping it up. Though I haven't seen too many at the local tracks.

 

well i bought a fmf titanium 4 exaust with stainless head pipe for my 04 yfz450 and love it...it was about $400..so good price and i love the power added and throaty sound....not sure of h.p., sound dcb's.. but for the price..i love it

 

I agree, look at that mag article to help you decide. I've got the GYT-R pipe and header pipe. I noticed a strong gain in power with these
products, but one of the other pipes might have been better. Don't forget to toss your lid and re-jet accordingly.

 

yea and get if u get a K&N rember to get an outerwear with that if u take the lid off[img]i/expressions/face-icon-small-wink.gif[/img]