I have stillen with no cats and custom tune and am enjoying it with no complaints. The GTM is in the better part of there S/C curve so they make better power and Sam seems to really back there product and stand behind it. I will not give Stillen that kind of credit. The Stillen blower is barely in the curve so a pulley change could make huge gains since it is good for a max of 22 psi according to vortex information. Right now I would recommend GTM because it appears like they are sticking around for a long time.
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2010 Mag Black, 6MT,
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