Predator 420cc

When it comes to upgrading your Predator 420 engine for racing performance, ARC Racing offers top-tier components engineered for speed, durability, and reliability. Whether you're looking to enhance power output, increase RPM limits, or ensure the longevity of your engine under high-performance conditions, ARC Racing has the parts you need.

Why Choose ARC Racing for Predator Parts?

ARC Racing is a trusted name in the high-performance racing industry, known for precision-engineered components that deliver outstanding results. Here’s why racers choose ARC Racing for their Predator upgrades:

  • Premium-Quality Materials – All parts are designed with high-grade aluminum and steel for maximum durability.
  • Proven Performance – Tested and used by top racers in the industry.
  • Expert Engineering – Designed to withstand the extreme demands of competitive racing.
  • Wide Selection – From billet rods to high-performance carburetors, ARC Racing provides everything needed for a complete engine overhaul.

Frequently Asked Questions

What’s the best upgrade for a Predator racing engine?

The best upgrade depends on your performance goals, but a billet connecting rod, high-performance camshaft, and racing carburetor are among the top choices for serious racers.

Do ARC Racing parts fit stock Predator engines?

Yes, many ARC Racing parts are designed as direct replacements for stock components, though some upgrades may require additional modifications.

Are modifications legal for all racing classes?

Racing regulations vary by class and organization. Always check with your racing association to ensure compliance with modification rules.

How do I increase the RPM limit safely?

Upgrading to a billet flywheel, stronger valve springs, and a high-performance camshaft can help safely increase RPM limits while ensuring engine reliability.

Shop Performance Parts at ARC Racing

Get the best Predator racing parts from ARC Racing today. Browse our selection of high-performance components and take your engine to the next level!

  • 6272 ARC Billet Rods, Honda GX340/390/420  4.41" X 1.419" X .788"

    6272 ARC Billet Rods, Honda GX340/390/420 4.41" X 1.419" X .788"

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    ARC billet stock replacement connecting rod for the Honda GX390. 4.410" center to center for a 1.416" crank pin and a .788" wrist bore. Manufactured from domestic 7075-T651 aluminum and uses 5/16" rod bolts designed and produced by ARP. Also comes with...
    RD$9,930.14 As low as $233.16/mo with Learn More
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  • 6274 Billet Rod Honda GX340/390/420 4.450" X 1.419" X .788"

    6274 Billet Rod Honda GX340/390/420 4.450" X 1.419" X .788"

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    ARC billet +.040" long connecting rod for the Honda GX390. 4.450" center to center for a 1.416" crank pin and a .788" wrist bore. Manufactured from domestic 7075-T651 aluminum and uses 5/16" rod bolts designed and produced by ARP. Also comes with custom...
    RD$9,930.14 As low as $233.16/mo with Learn More
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  • 6382 HP Rod Bolt Set 5/16-24x1.5

    6382 HP Rod Bolt Set 5/16-24x1.5

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    Rod Bolt Set,  5/16-24 X 1-1/2" 12pt 170k tensile strength. This ARC rod bolt set comes with bolts specifically designed for ARC Racing by ARP, the world leader in performance fastners. The bolts feature rolled threads and are maufactured from 8740...
    RD$1,257.57 As low as $29.53/mo with Learn More
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  • 6564-C GX390 +.200 Stroker Crankshaft

    6564-C GX390 +.200 Stroker Crankshaft

    GX390 +.200 Stroker Crankshaft. 2.720"(69mm) stroke with standard crank pin diameter. Machined in house from hardened 4340 Chromoly to the exact standard you have come to expect from ARC. Dual plane balanced to eliminate the need for the OEM counter...
    RD$34,171.07
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  • 6603-GX3 ARC GX390 Flywheel, 5-3/4" Diam. Finless 2.90lbs

    6603-GX3 ARC GX390 Flywheel, 5-3/4" Diam. Finless 2.90lbs

    ARC Racing 6603-GX3 Billet Flywheel for the Honda GX340 / GX390 / 420cc / 460cc engines. 5-3/4" Diameter, Finless Flywheel for drag racing. SFI certified Billet Aluminum 3 hp diameter flywheel for Drag Racing Applications(no fins). The keyway is in...
    RD$12,251.26
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  • 6609GH3 Ring Gear for GX340/GX390 Billet Flywheel

    6609GH3 Ring Gear for GX340/GX390 Billet Flywheel

    Flywheel Starter Ring for ARC 6622 / 6623-E / 6693-E flywheel for the Honda GX340 / GX390 / 420cc / 460cc engines. 8" OD, 5-1/2" ID 6623-E / 6693-E Will Require 902570 Spacer 6622 Does Not Require 902570 Spaer
    RD$5,297.84 As low as $124.40/mo with Learn More
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