I have the Spugen SS duals with Ti tips, really nice looking but a tad too loud without silencers. Got it dyno'd few weeks back and also saw some back pressure loss at low rpms compared to stock exhaust but peak hp didn't increase. So today I decided to go to a muffler shop and had them cut my Spugen exhaust in half and replace it from the cat back with the OEM resonator. Cost: $75

Pic#1 (Cut stock exhaust)


Pic#2 (OEM resonator welded to Spugen exhaust)


Pic#3 (Close-up of weld just before Spugen Y)


Pic#4 (Spugen Y)


Results: Got the punch back at lower rpms while still having the power up high. Boominess gone and droning on the freeway between 3500-4000 rpm gone. Tone stayed the same which is nice and deep. Good mod if you don't dig your aftermarket exhaust being too loud or boomy. Got info from Duc where to cut and weld, thanks!

 

I will probably be doing this in a couple of weeks with dual/oval tip setup

 

Any dyno runs since you made the change?

 

yeah i second that..... it seems as though that this car is tuned so well from honda that any little change could have negative effects on performance.

 

Not yet, just got it done yesterday but I definitely got the punch back at low and midend which is what I wanted.

 

Hyperpm i'm running Spugen exhaust with stock resonator. i've got the Dual Ovals/Round Tips.

So what did you have before, did you have the magnaflow resonator?

 

Yes please dyno, when I talked to DUC, my impression was that the HP gains from the spugen exhaust was from the less restrictive pipings (stright pipe design)....this may have reduced you high end HP but increased your low to mid range gains....
Beroz

 

[QUOTE]Originally posted by s2k_9000rpm
[B]Hyperpm i'm running Spugen exhaust with stock resonator. i've got the Dual Ovals/Round Tips.

 

And dude, are you a Ninja........

 

EDIT: I'll get a dyno this week and post new chart.