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Engine Rebuilding Process
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Engine Rebuilding FAQ
Tech Center
Instructions
Technical Documents
Rebuild Process & Shipping
Racing Team
Sponsors
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Products
2-Stroke Engine
2-Stroke Engine
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Standard Work Order Form
Engine Work Order Form
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Vortex
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Duncan Racing International
Shop Products
4-Stroke Exhaust
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Fat Boy 4 4-Stroke Accessories
Fat Boy 4 4-Stroke Power Exhaust
Fat Boy 4 Replacement Parts & Tools
Honda '06-'14 TRX 450R Fat Boy 4 Complete Exhaust System
$699.00
Honda '04-'05 TRX 450R Fat Boy 4 Complete Exhaust System
$699.00
Yamaha YFZ 450R Fat Boy 4 "National" Complete Exhaust System
$779.00
Yamaha YFZ 450R Fat Boy 4 Complete "STD" Exhaust System
$699.00
Suzuki LTR 450 "NATIONAL" Fat Boy 4 Complete Exhaust System
$749.00
Yamaha '04-'09 YFZ 450 Fat Boy 4 Complete Exhaust System
$699.00
CALL FOR DETAILS/AVAILABILITY
Honda TRX 400EX Fat Boy 4 Complete Exhaust System
$699.00
Yamaha 2015-22 Raptor 700 "National" Fat Boy 4 Exhaust System
$799.95
Yamaha 2006-14 Raptor 700 Fat Boy 4 Complete Exhaust System
$749.00
Yamaha Raptor 660 Fat Boy 4 Complete Exhaust System
$699.00
Yamaha Raptor 250 "NATIONAL" Fat Boy 4 Complete Exhaust System
$549.95
Honda TRX 700XX Fat Boy 4 Complete Exhaust System
$699.00
CALL FOR DETAILS/AVAILABILITY
Suzuki LTZ / Kawasaki KFX 400 Fat Boy 4 Complete Exhaust System
$0.00
CALL FOR DETAILS/AVAILABILITY
Yamaha Raptor 350 Fat Boy 4 Complete Exhaust System
$0.00
CALL FOR DETAILS/AVAILABILITY
Yamaha Warrior Fat Boy 4 Complete Exhaust System
$0.00
CALL FOR DETAILS/AVAILABILITY
Kawasaki KFX 700 Fat Boy 4 Complete Exhaust System
$0.00
CALL FOR DETAILS/AVAILABILITY
Kawasaki KFX 450 Fat Boy 4 Complete Exhaust System
$0.00
CALL FOR DETAILS/AVAILABILITY
Honda TRX 250EX Fat Boy 4 Complete Exhaust System
$499.00
CALL FOR DETAILS/AVAILABILITY
Honda TRX 250X/300EX Fat Boy 4 Complete Exhaust System
$499.00
CALL FOR DETAILS/AVAILABILITY
Custom Colors for Fat Boy 4 Exhaust Systems
from $24.95
Fat Boy 4 Replacement O-Rings
$2.95
Fat Boy 4 Rebuild Kit "A"
from $84.95
Fat Boy 4 Rebuild Kit "B"
from $54.95
Fat Boy 4 Replacement Packing
from $34.95
Fat Boy 4 Replacement End Caps
$69.50
Fat Boy 4 Replacement Screws
from $0.36
Fat Boy 4 Replacement Stainless Steel Muffler Cores
from $39.50
CALL FOR DETAILS/AVAILABILITY
Fat Boy 4 Turndown
$59.95
CALL FOR DETAILS/AVAILABILITY
Fat Boy 4QP-2 Quiet Tip
$129.95
CALL FOR DETAILS/AVAILABILITY
Spark Arrestor Screen for Fat Boy 4 with Turndown
$17.95