Exhaust Full Velocity / Pro-R 600 ('13+) Finish:Black **Durability "Tall Boy" replacement piston

**Durability "Tall Boy" replacement piston must be used with our spacer

Gains 4-5 horsepower mid-range and peak

Stock Optimized - 91 Octane 82 RWHP (Stock levels with limiters raised and/or removed)

No fuel controller required

add our billet intake manifolds

Exhaust Full Velocity / Pro-R 600 ('13+) Finish:Black **Durability "Tall Boy" replacement pistonWeighing in at a mere 7. 5 lbs this muffler will shave a ton of weight off your sled. The fully baffled design gives a deep throaty sound without being too loud. This muffler won't lose horsepower like some of the glass pack style mufflers can do. Easy bolt on and go with no fuel changes necessary. Available in high temp black or ceramic chrome.