Blow-By Racing 2.57 Supercharger Pulley & 90mm Billet Aluminum Pulley
This Kit allows you to reuse your stock belt and gain that extra 4 psi you have been looking for. We have seen as much as 60 HP & 50 lbs of TQ from our Dyno Teasting - on average we see 25 Hp and 40+ lbs TQ.
SCT & Diablo Custom Tuning not included & a custom tune is required.
***FYI: This pulley will NOT fit the TVS Roush Superchargers***
Note: 2005-2008 Roush cars or kit bought in those Years will have a Bolt-on style pulley with a key way.
2009 + Roush cars and kit bought in 2009 to current have the new press-on style pulley.
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