SHELBY GT 350 Member
Joined: Jan 2011
Location: Central Massachusetts
Personally I would go with the Roush, because I like the idea of big-block-style low end torque ; and from what I understand, they offer a real nice plug-and-play kit.
If you prefer the higher RPM power of the centrifigual, then go with the Paxton.
I think that is basically what it comes down to.
| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day