I believe their MSRP is 695 + a possible s2ki discount but you'd have to check with them about that.

The noise level is the same as my invidia really so no real difference as far as I can tell. However, it does sound 10 times sweeter Nothing beats being able to hear the turbine spinning at idle

A retune is recommended but not required. Your car will run a little richer and produce a little more boost so you should lean it out and adjust the boost controller accordingly

 

My 3" downpipe all the way back gets stupid loud once I hit vtec. I don't like to announce I'm mashing the pedal but if you want the most hp you have to give something to get something.

 

Wow nice! 20WHP are gooooooooooooooooooood!

 

thinking about it conceptually, i would have thought that the car would run leaner, not richer... due to the increase in efficiency... and i also would have thought that the psi would decrease, not increase, because of the less backpressure post turbo.... correct me if im wrong though!

 

That's sorta what I thought too.

 

With switching to a 3inch from whatever before the car would run on the leaner side.

-Chris

 

I mistyped that, your right it would run a little leaner.

However, the higher boost is correct. By removing the restriction your basically letting the turbine spin faster and quicker then before thus creating a little more boost. We arn't talking 10psi more here, more like 1-2psi; I had to turn my boost controller down a couple notches to keep her at 18psi with the new exhaust.

 

A wastegate spring opens at a specific ABSOLUTE turbine manifold pressure. If restriction is reduced anywhere downstream of the turbo, the flow rate that corresponds to that particular turbine manifold pressure opening the wastegate will be slightly higher. Thus the turbine will ultimately spin a little bit faster at it's maximum speed. Seeing how the turbine and compressor utilize the same shaft, the compressor will also spin a little faster at it's maximum speed. More intake pressure (boost) develops for this reason. The pressure differential across the engine at any particular RPM and boost level will be correspondingly slightly higher with less restriction downstream of the turbine.

You can turn down the boost to compensate and achieve the same power/torque levels as before or just reap the benefits of the higher flow rates and tune the map accordingly.

 

Yeah, I made 415rwhp at almost 19psi and now I make 435 at a little under 18psi . Definatly makes the engine more efficent

 

good stuff i have the same exhaust and i love it!