Took her to the dyno today

Red370

for some odd reason, the test pipes are either even or slightly less in the power making department. There are a few guys with full bolt ons, headers, intake, exhaust, hfc's making about 320-335whp, depending on the dyno, up from 275-285, that's pretty damn good I'd say! I think the average CAI, HFC, CBE combination nets about 30whp, not bad.

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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs

Baddriver

320+ up from 280+ is mighty impressive. I think it's worth the cost then. I've already installed the hks suction kit so I'm done with the intake (nismos won't fit the Stillen CAI).

My main concern is sound too and 5zigen (along with Stillen) is the best sounding IMO. I'm willing to sacrifice some whp for that awesome sound. So definitely, HKS exhaust is crossed out of the list even if it could give me more power. Also, I kinda want to keep my japanese car with jdm parts (no offense to american part makers, just a preference). besides, it's waaay easier and faster to ship japanese parts to where I'm from. Any info on the whp gains on japanese exhausts would be appreciated

I'm rambling... I'll read more on the best full exhaust mods. thanks

chuckd05

What facts do you have to support this ? The majority of guys on here have hfc's . that's for sure but there is hardly any info on test pipes on here. Not one sound clip and i don't think a dyno either . Just because most people have hfc ESP in Cali doesn't mean test pipes are worse. I'd be willing to wager some funds that test pipes will make more power, not much but not any less. My vq35de gained almost 4whp going from hfc to test pipes.

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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)