Exhaust, Headers and Mufflers for Predator 420cc Engines.

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1" Header Sleeve Woven Material

Thermal sleeving capable of withstanding 1100 degree Fahrenheit continuous. This non-flammable sleeve has a special weave that allows it to expand and contract over fittings. In addition, it has that old school sleeve look with modern heat shield...

$8.99

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Exhaust Stud Kit

Replacement Exhaust Studs and Flanged Nuts.

$3.99

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OMB Warehouse

Header Exhaust Muffler Wrap Tape

10' x 2'' x 1/16'' Universal Muffler / Header / Exhaust Wrap.

$12.65

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RLV

1" RLV Exhaust Silencer

1" RLV Exhaust Silencer. Slip-on fit for 1" headers. Use RLV_4140 to complete installation RLV Enviro-Safe 4-cycle silencers are WKA legal & IKF approved. Designed to reduce noise (4 dB to 6 dB) and backfire of the 4 cycle engine, not the horsepower.

$45.95

$45.25

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RLV

RLV 1-5/16" Stainless Muffler Clamp

1-5/16" Stainless steel silencer clamp for B91XL or B91MO

$6.95

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RLV

RLV Stock 1 5/16" Muffler (BP)

RLV 4104 "Stock" muffler (B91XL 1-5/16") Comes with a clamp for the support bracket only. No clamp for the muffler to pipe is included

$47.99

$46.99

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RLV

Muffler, Open Modified 1 5/16"

1-5/16'' Modified RLV Exhaust Silencer RLV Enviro-Safe 4-cycle silencers are WKA legal & IKF approved. Designed to reduce noise (4 dB to 6 dB) and backfire of the 4 cycle engine, not the horsepower. Modified and open Comes with a clamp for the...

$45.95

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Exhaust Gasket Fits Honda 18333-zk6-y00 Fits Gx240 Gx340 Gx390 Gxv120 Predator 301 420

Rotary Corp brand aftermarket product. Exhaust Gasket Fits Honda 18333-ZK6-Y00 Fits GX240 GX340 GX390 GXV120 4HP

$3.98

$2.54

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Mud Boat Header GX390 Predator 420 13-15HP Clone

Exhaust System (Header), Mud Motor, Mud Skipper, & Long Shaft - GX270, GX390, & 420cc Predator Exhaust designed to exit parallel with the output shaft. For Mud Boats. Muffler IncludedFits GX240 to GX390, 13/15 hp Chinese OHVs, & 420 Predators

$54.99

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Header Side Exit GX390 Predator 301/420

Side exit header for big block OHV engines 1-1/8" pipe with the last stage at 1-5/16" Fits Honda GX240/270/340/390, Predator 301/420, and many 8-16HP Chinese OHV clone engines May require shorter header studs for mounting. Gasket is not included.

$49.95

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RLV

1-1/8'' RLV Exhaust Silencer

1-1/8'' RLV Exhaust Silencer RLV Enviro-Safe 4-cycle silencers are WKA legal & IKF approved. Designed to reduce noise (4 dB to 6 dB) and backfire of the 4 cycle engine, not the horsepower.

$43.95

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RLV

RLV Trumpet End for 1-5/16" Pipe Headers

RLV Trumpet End for 1-5/16" headers Increased all-around performance Increased sound Slotted for easy assembly (or can be welded on) Clamp Sold separately. Use RLV_FAS6584 clamp

$11.95

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RLV

RLV Trumpet End for 1" Header Pipes

RLV Trumpet End for 1" headers Increased all-around performance Increased sound Slotted for easy assembly (or can be welded on) Clamp Sold separately. Use RLV_FAS6580 clamp

$10.99

$10.95

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NONE

DJ-3330S GX390 Metal Exhaust Gasket

GX390 Metal Exhaust Gasket

$2.12

Out of stock
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RLV

RLV Trumpet End for 1-3/8" Pipe Headers

RLV Trumpet End for 1-3/8" headers Increased all-around performance Increased sound Slotted for easy assembly (or can be welded on) Clamp Sold separately. Use RLV_FAS6585 clamp

$10.95

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OMB Warehouse

Center Exit Header GX270 GX340 GX390 Predator 301 420

Performance Exhaust for Honda GX240 GX270 GX340 GX390, Predator 301 420, and similar 8 to 16 HP Chinese OHV engines. Center exit over rear tire.Heavy gauge steel This is a universal fit header and may not fit all minibike frames!WARNING: Pipe should be...

$57.99

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OMB Warehouse

Header Insulation Tape - 25'

25' x 2'' x 1/16''

$31.35

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RLV

1-5/16 Stainless T-Bolt Clamp

Stainless Steel T-Bolt Clamp for muffler/silencers going on 1-5/16" header pipe

$9.95

$8.40

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Mud Boat Loop Header GX390 Predator 420 13-15HP Clone

Header, Mud Motor & Boat, High-Performance Loop - GX270, GX390, & 420cc Predator High-Performance Loop Pipe for modified Mud MotorsExhaust designed to exit parallel with the output shaft. For Mud Boats. Fits GX390s, 420 Predators, and most...

$93.99

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6" Silencer sleeve kit - w/clamps

6" Silencer Sleeve Kit - w/Clamps for RLV silencers

$4.85

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Exhaust Gasket Honda GX390 Predator 420

Replacement exhaust gasket for Honda GX110 GX140 OEM part number 18381-ZE1-800

$2.50

$1.25

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Replacement Muffler for Honda GX390 Predator 420 13HP Clones

OEM Take off, complete with shield. Gaskets not included. Fits Honda GX390, Predator 420, and many 13HP ClonesMay vary from picture.

$21.99

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ARC Racing

DJ-151250-390 1.250" ID 3 Stage Header Predator 420 301 GX390

15" X 1.250" ID 3 Stage Straight Header Fits Honda GX270 GX340 GX390, Predator 301 and 420, and most 8-16 HP OHV Clone engines

$39.50

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RLV

1-3/8" Stainless T-Bolt Clamp

Stainless Steel T-Bolt Clamp for muffler/silencers going on 1-3/8" header pipe

$7.95

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Exhaust, Headers and Mufflers for Predator 420cc Engines.