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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!

  • DJ-1152A Fuel Hose Clips

    DJ-1152A Fuel Hose Clips

    (7)

    These are the clips used with our DJ-1152 Fuel Filters. They are simple, easy to use and stay where you put them.
    $0.75
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  • DJ-1231 Carburetor Throttle Rod and Return Spring

    DJ-1231 Carburetor Throttle Rod and Return Spring

    (2)

    These items normally come with every engine as part of the original governor assembly.  They are both required when using any of ARC's engine top plates. ***Will Not Work with big block GX390 or 420 style top plates. Must use the OEM throttle rod...
    $3.18
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  • DJ-3108 GX270-GX390 Dyno 356 WLC Cam

    DJ-3108 GX270-GX390 Dyno 356 WLC Cam

    (1)

    The DynoCams 356 is a high lift modified grind that is very capable of extreme RPMs. This cam has very aggressive ramps and requires an upgraded spring package, billet rod, and billet flywheel. For use with Tillotson or larger carb.Engine: Honda...
    $138.77
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  • DJ-3112 GX270-GX390 Dyno 308 WLC Cam

    DJ-3112 GX270-GX390 Dyno 308 WLC Cam

    This cam is easy on the valve train and has a very wide power band. This cam requires an upgraded spring package, billet rod, and billet flywheel.Engine: Honda GX270-GX390INTAKELIFT: .308Dur @ .050": 244.2 Deg. C/L: 108 ATDCEXHAUSTLIFT: .308DUR @ ...
    $138.77
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  • DJ-3114 GX270-GX390 Dyno 275 WLC Cam

    DJ-3114 GX270-GX390 Dyno 275 WLC Cam

    (1)

    This cam is to be used in mild modified applications. It will require an upgraded spring package, billet rod, and billet flywheel. Engine: Honda GX270-GX390INTAKELIFT: .276Dur @ .050": 239.5 Deg. C/L: 108 ATDCEXHAUSTLIFT: .276DUR @ .050": 238.8...
    $138.77
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  • DJ-3146 ARC Top Plate/Throttle Assy, GX270-GX390

    DJ-3146 ARC Top Plate/Throttle Assy, GX270-GX390

    (3)

    ARC introduces a new Top Plate/Throttle Control Assembly for the Honda GX340/GX390 Engines. This Part is made with quality components and the same attention to detail and quality workmanship that our customers have come to expect from ARC. Includes...
    $40.00
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  • DJ-3225-KIT GX390 to GX200 .900" bore Methanol Carb Kit

    DJ-3225-KIT GX390 to GX200 .900" bore Methanol Carb Kit

    Please Call To Order GX390 to GX200/Predator 212 Methanol carburetor kit. Not Available On Line... These carbs are individually built to your specific engine package, therefore you must Call In to order (800-521-3560  M-F 7:30-4:30 EST)...
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