I've searched but only found one or two that had other mods. I know Stillen claims 20hp but most here gain 10ish. DaveB said his friend saw 5hp. Anyone else?

 

expect anywhere from 5-10 rwhp just like stillen because it is true dual. Now i am a big believer in tune otherwise ur stock ecu map is too restrictive for it to gain any real power with breather mods.

 

Which exhaust you running? Thanks.

 

My exhaust is very similar to stillen.

 

I have the Borla exhaust and I can't really understand why more people don't like it. I have not had the car re-flashed yet, as I still want to make a couple small mods before I do. Thus, no dyno results either.

I will tell you that my calibrated butt dyno senses a noticeable difference in midrange and high rpm power. The sound is fantastic. Between the breather mods up front and the exhaust, my car sounds like a beast.

 

got pics?

 

no, i will get it on saturday if u would like.

 

Any threads/posts where I can see this gain?

 

I'll see if I can find all the old exhaust shootout dynos on my computer at home.
On "stillen day" back in '05, stock '03 auto coupes were dynoing 220ish whp/205ish wtq. With all my addon junk (z-tube, pop charger, MD 1/2" spacer, borla, and TS ECU reflash) I made 249 whp/227 whtq on the best pull.

Do you feel any difference? And can you stand the sound difference?

 

Idle and 3k+ rpm is fine. But I'm right on the fence for the 1500-2800 rpm drone. On my auto all the gear changes are right in the 2500 rpm range. I've taken my daughter around and she doesnt' seem to mind but I haven't had the wife in it yet.

From what I read, the Borla should be the quietest full TD system. I dont' see how to get it quieter unless one puts another huge resonator in place of the dual resonators after the Y. I believe most of the drone is coming from those two resonators.

 

Yeah, the noise difference in the coupe isn't as noticeable as the sedan.

 

It's odd. I would think the coupe version would be loud. Sedan has a huge muffler type can at the Y. Coupe has just an H pipe. Both have the same resonators
Coupe:


Sedan

 

https://g35driver.com/forums/showthr...haust+shootout
http://www.everything350z.com/exhaust.html

Some more info. . .from WAY back in the day. . .

Oh, and since they still love me down in SoCal, here's a link to a dyno day from 2004. EdLin is the only sedan that I know that has/had a borla.