Project Evo X GSR – Keeping Cool with Greddy and Koyo

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The upper hardpipes and BOV in place.
 
Some of the lower piping from the turbo to the to the intercooler that necks down in size in stock form are replaced with Greddy’s kit as well.
 
Since we plan on running our stock MAF, we felt that it was best to recirculate our BOV.  A lot of guys like the loud whoosh sound but for best driveability on a MAF equipped car it is usually recommended to reroute the bypassed air back into the engine before the turbo but behind the MAF.  That way you don’t dump metered air overboard and have the engine run rich and possibly stall between shifts.
 
We replaced the Greddy BOV’s trumpet with this straight tube included in the kit.
 
The air has to make a 90 degree turn into the K&N air intake from the BOV.
 
The Greddy recirculatioln pipe had to be shortened since it was designed to be used with the stock intake pipe and our K&N intake was slightly different in configuration.  This was a piece of cake.

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