Quote:
Originally Posted by steve shadows
Oldest trick in the turbo book - which is perfectly ethical business - but does the price warrant the adjustment.
I guess it's trade secret 
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lol nope, because the stock housing restricts the flow, ive seen it Z guys stuffing gt2560 rotating assemblies on the stock housings loosing on average 50 - 60whp because of the housing alone. on the lower 12psi range.