DRI 4-Stroke Bolt-on Kits are designed to provide the maximum horsepower increase while preserving reliability

Product Information:

S-1 Kit #BK4-2450 $749.00
Includes: Complete Fat Boy 4 Exhaust System (with STD Muffler), Pro Flow Air Cleaner Kit (Pro Flow flange, K&N, Outerwear)
Power Gains: 6-7% gain in HP
Excellent Start Up Performance Mods. Stage 1 Power Kits are designed to work with most DRI engine kits