DR “ELIMINATOR HP” Yamaha YFZ 450R Bolt On Kit
Part Number: BK4E-345R-FC / BK4E-345R-PF
DRI offers a LIFETIME WARRANTY against defects in materials and workmanship on all Fat Boy 4 exhaust systems sold. Warranty is for original purchaser only and is non-transferable. Each system is supplied with warranty registration card that must be read, signed and returned to DRI.

Product Information:  DR “ELIMINATOR HP” Yamaha YFZ 450R Bolt On Kit
Includes: Fat Boy 4 complete NATIONAL Exhaust System, Vortex ECU, Air Cleaner Kit (FCI or Pro Flow)

***30 DAY 100% SATISFACTION MONEY BACK GUARANTEE***

Description: The ELIMINATOR HP kit is the #1 performance modification for your YFZ 450R. Works great for all applications, Race or Play. Kit performs great on stock motors but is also works ideal with built engines.

Model: 2009-2021 Yamaha YFZ 450R

Price:  
# BK4E-345R-FC   $1695.00 w/FB4 Exhaust, Vortex ECU, FCI Intake
# BK4E-345R-PF   $1549.00 w/FB4 Exhaust, Vortex ECU, Pro Flow Intake

Performance: 14+ HP Gain when tuned properly
Great Power Gain!
Excellent Throttle Response-Very Strong Midrange Pull-Excellent Top End
**Guarantee Best YFZR  Bolt-On Kit-Great Entry Level Performance**

Other Required modifications: None

Support: Complete Instructions, Unlimited Telephone Tech Support

Engine Performance: DR offers complete engine build s for the YFZ 450R; complete rebuilds, porting, big valves, HP camshafts, high compression pistons, crankshaft rebuilds, big bore kit, clutch upgrades, etc.
Call DR #619-258-6306 for free consultation with engine tech.

 Product Description:
FAT BOY 4
-Lifetime Warranty against defects in materials and workmanship (original purchaser/packing not covered)
-CNC Bent 304 stainless steel headers, mid-pipes and tail sections. Standard finish; brite finish.
-CNC machined stainless steel header flanges.
-Custom designed .100" wall aluminum extrusion muffler body. Standard finish satin. Polished by special order.
-Front and Rear End Caps CNC machined from 6061 billet aluminum.
-Muffler mounts CNC machined from single piece of 6061 billet aluminum. Attached  to muffler body by heli-arc weld.
-O-Ring Seal at tail pipe to muffler joint.
-All mufflers completely rebuild able and repack able.
-Stainless muffler cores.
-All systems are individually marked with their own serial number.
-Complete DRI Technical phone support for installation and tuning questions.
VORTEX ECU:
-1 Year Warranty from DOP
-Complete stand alone ECU (Engine Control Unit) Plug and Play.
-ECU comes loaded with 10 High Performance Maps ready to go.
-No Lap Top Required.
-No Dyno Tuning Required

AIR CLEANER KITS:
FCI Kit: for Maximum Air Flow. includes: Paper filter, outerwear, molded hi flow air boot, bracket/hi flow airbox

Pro Flow Kit: Very Good Air Flow w/ superior protection. Includes: Billet flange, K&N filter, outerwear. Uses original OEM airbox.

Optional Accessories
Custom Color FB4 Mufflers and End Caps Available      call for details

Fat Boy 4 Replacement Packing  only $34.95

Fat Boy 4 Rebuild Kit A                                           $64.95
*includes: packing, screws, o-rings, thread lock, decal, instructions

Fat boy 4 Rebuild Kit B                                           $39.95
*includes: packing, screws, o-rings, thread lock, decal, instructions

FCI Replacement Air Filter
FCI Replacement Outerwear

Pro Flow Replacement K&N Air Filter
Pro Flow Replacement Outerwear

Vortex X10 Handlebar Switch

Fat Boy 4 4-Stroke Power Exhausts are a proprietary product of Duncan Racing International, Inc. DRI is the sole manufacture and developer of this product. DRI has designed this product to be the top ATV 4-Stroke exhaust on the market.