[antares7751]

Is there any gain in horse power with adding the EVO Magnum slip-on exhaust?

 

[PaulF]

No.

 

[De Keyrel Racing]

Graves says 7HP on theirs. I think HMF is about the same as to them. Call the guys at PPEI. They have ran a bunch on the dyno. Turbo and no turbo. Plus they offer tunes for them all.
www.ppei.com

 

[antares7751]

I called EVO, and they said about 4 hp and an increase in throttle response. I ordered it, and will be happy with just the sound difference, if nothing else.

 

[Glenn]

None noticeable. Lots of annoying noice though. 😬

 

[Go Talon]

I called EVO, and they said about 4 hp and an increase in throttle response. I ordered it, and will be happy with just the sound difference, if nothing else.

This is my take as well.

 

[19PSU88]

Allba that posted the stock exhaust header was really really good from Honda outta the box - look elsewhere for HP, there site says 5HP with their muffler - so IMO juice ain’t worth the squeeze.

 

[BlueDog1210]

You will see a modest gain if you add a tuner to the exhaust! Not many do dyno before and after and that is the true measure of improvement. Manufactures try to put their products in the best possible conditions as well. I know I love to run after HP gains as well! Just have to figure the HP to $ ratio!

 

[19PSU88]

$200/HP for the Graves system.
$150/HP for the EVO system.
$125/HP for the Alba muffler/ecu tune

 

[BlueDog1210]

I went with HMF full exhaust and tuner with Wideband O2 and intake mod. The sound is super!

According to HMF and tune 11 HP gain.
Rough estimate is about $180/HP.

 

[rednekk_wv]

I went with HMF full exhaust and tuner with Wideband O2 and intake mod. The sound is super!

According to HMF and tune 11 HP gain.
Rough estimate is about $180/HP.

what is Wideband O2 and intake mod and do u have linnks