Working with our friend at Turbo Parts Canada, we have the first modded FP Blue on a single AVCS WRX. He started with porting the exhaust inlet and using a lighter exhaust turbine wheel, dropping the weight from 263 grams to 187 grams, to increase spool. That is 28% weight savings! Then he moved on to clip the exhaust wheel, which helps with top end power. A clipped turbine wheel typically causes loss of spool and better top end power. With this combination of clipped and lightened wheel, we only lost 200 rpm of spool.
With this mod we have an increase of 9WTQ and 13WHP. The gains are throughout the whole curve, but more so from 4700rpm to redline, without the need to add additional boost up top!
CNC ported exhaust inlet gasket matched.
Clipped exhaust wheel