Tuner's claims are somehow similar (according to their web sites):
Ecode: SOLID 15HP GAIN
ATP: HP gain is 10-15 on stock and K04 turbo.
Well, I decided to check that out.
I got the nice and shiny 2,5" test pipe (I do not want to give any names here, 'cos honestly - I do not belive that any test pipe, be it Ecode, ER, Supersprint, ATP or whatever, would measure any different), I put it at my dealership and went for a ride.
WOW ! The sound itself was worth the price of admission. Car has a nice growl at low RPMs like V8 ... or make that V6.
My butt dyno reported significant hp gain (or at least that was what I thought hearing the nice growl).
So, the last step was to go to the dyno, to find out how much HP did I actually gain (same dyno, same dyno operator, gear, outside temp, fuel etc - only one day later).
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The net resoult is: +0Hp and +0Nm (Nm is metric torque = lbft * 1,36)
LOL
If you look VERY close, there is some improvement in 3-4.5k range (up to 10Nm in one place), but it is nowhere near the advertised HP gains and, in IMO, not worth the hassle (check engine light, smog test problems etc).
Summary:
Test pipe: 200$
Install: 80$
Dyno x2 : 60$
Seeing owner's face after looking at the dyno plots: PRICELESS
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