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

Product Information:

S-1 Kit #BK4-4000 $779.00
Includes:Complete Fat Boy 4 Exhaust System (with STD Muffler), Jet Kit, Pro Flow Air Cleaner Kit (Pro Flow flange, K&N, Outerwear)
Power Gains: 5HP+

Excellent Start Up Performance Mods. Stage 1 Power Kits are designed to work with most DRI engine kits.
For a slightly more aggressive Bolt-On kit check out the DRI stage 2 S-2 HPV Bolt Kits (not available for all models)

S-2 Kit #BK4-4000-VHP DISCONTINUED