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Predator 301 & 420 Performance Kit

$37.50 $33.45
(You save $4.05)

Product Description

Our predator performance air filter adapter kit is a very popular kit that includes a K&N style high flow air filter, aluminum air filter adapter, and an upgraded drilled main jet for the carburetor. This kit is a simple but very effective upgrade over the stock air box and exhaust.  With the added air flow, the more rich main jet is mandatory for optimal engine performance.  Filter inlet measures 2 7/16" ID and 2 7/8" OD and will vary in colors. Includes choke hold bracket as well.
Red filter, adapter is only available in black.

Compatible with:

  • Honda GX240 & GX270
  • Predators Engines 301cc & 420cc

Product Reviews

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  1. Air filter and jet kit

    Posted by Michael on 6th Nov 2017

    Awesome product made a big difference in my motor that I use on my boat as a surface drive mud motor defitnley worth the money highly recommended!

  2. 420 & 301 performance kit

    Posted by on 1st Nov 2017

    Got kit everything seemed to fit well. I have not ran engine yet with this kit doing other modification wish other parts for the 301 cc predator

  3. Awesome

    Posted by Unknown on 17th Aug 2017

    Great kit really gives you that missing horse power you've been itchin for

  4. Added power

    Posted by Cody on 5th Jul 2017

    Well I had this on a 15 predator surface drive and I went from 20 mph to 15 after adding this performance kit was easy to install and really helped to open up the motor. Will be buying more parts from gopowersports soon.

  5. Duromax

    Posted by Loy on 3rd Jul 2017

    Tested on a Duromax 440cc 18hp I dropped in my kids Baja Dune (ex 150) several months ago. Noticeable difference from the stock 440 and crisper response. The jet that came with the 420 kit is still much larger than the stock on our 440. Very little filing on adapter to clear the head of the flange nut that retains the carb. Easy install. Would definitely recommend

  6. nice product

    Posted by Unknown on 12th May 2017

    direct bolt on is nice!

    choke lever retainer needs to be finessed to fit properly. but not to bad.

  7. What next.

    Posted by Paul on 10th May 2017

    So far everything from GoPowerSports is spot on. now that i have this air filter kit i think the ehaust will be next . i total transformed this go kart with all of GoPowerSports on line products. keep up the good service. Thanks

  8. It's one of those 'Must Haves'

    Posted by Jim on 23rd Apr 2017

    These upgrades have me wondering why I waited so long. My package included the header pipe and with the increased air intake and the 420 jet, my Preditor 420cc has really come to life. It has never run this good, even when new.

  9. works fine

    Posted by pete albritton on 12th Apr 2017

    Extended 4 wheeler into side by side needed exhaust and air filter small enough to fit under top frame worked out great soon have it finished and in use.

  10. 420 performance kit Amazing

    Posted by James Franklin on 10th Apr 2017

    420 performance filter kit was one the best purchases Ive done for our engine. Quality made parts from adapter to filter. Cant wait to put this engine on something to feel the power its making.

  11. Predator 301 Performance Kit

    Posted by Will Hunt on 14th Mar 2017

    Great kit for the Predator 301. Our sons, 12 and 16, got it working within an hour. The design is very well thought out.

  12. 420cc performance kit

    Posted by Andrew Gambler on 10th Feb 2017

    Easy to install and helps get the most out of your predator motor. Very happy with the purchase.

  13. Worked great on my ironton 16hp engine. Sounds good too

    Posted by Clinton Christy on 17th Jan 2017


  14. 420 predator

    Posted by Dave on 17th Oct 2016

    Bought exaust pipe an high flow filter kit. One thing I liked about kit they put the jet you need in the kit no guessing. Seems to be running better an sounds great . Thanks

  15. Predator 301 & 420 Performance Kit

    Posted by John in FL on 23rd Jun 2016

    My 420 was flooding out but thanks to go-power sports for the new jet. Now she is running like a top!

  16. Predator Performace Parts

    Posted by John on 20th Jun 2016

    Couldn't wait to get this out of the box and try it on the track! Easy to install and it fit perfectly without any modifications. My kart now has a lot more power and it brought my 40 series torque converter alive. As always, product was shipped quickly and intact along with status updates along the way. Go power sports delivers everyone, thanks and keep up great work.

* Free Shipping on most orders over $200 on most orders within the continental United States.

Adult signature required on all orders over $300.00!

* Certain bulk items and large unit purchases, such as go kart kits may not be eligible for free shipping offers.
* Free Shipping offers can take 1 to 3 business days to process and 5 to 10 additional days to arrive.
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* Please allow 24 to 48 additional hours (during high demand periods such as Christmas).
* Exclusions apply (no International Orders receive free shipping.)
Listed shipping charges are for shipments for the U.S. and Canada.
* Shipments to all other countries will incur additional shipping charges, call for a quote.
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* Same day shipping Monday thru Friday if placed before 1PM
* Standard business delivery is Monday - Friday
* Standard home delivery is Tuesday - Saturday
* Secound Day does not include weekends or holidays




All import duties and taxes that your country applies to purchases are the responsibility of the receiving customer. Please be aware of these charges before you order. Our shipping quote does not include these charges.  If you refuse or send back the package, unfortunately the package will be destroyed and the order will not be refunded due to the high cost of paying return duties and taxes. 

Free Shipping offers DO NOT apply to International shipments.

We only use Fedex for shipping International orders.

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Due to the high cost of shipping to International locations, we recommend calling or emailing us with any questions you may have about the product and it's sizing. Unfortunately, due to the high cost of shipping, International orders are NOT eligible for returns or exchanges.

Order Cancellations, Refusals, and Address Changes

Requests must be made by phone or email. Requests must be made by 11AM EST the day after the order was placed. If the order was placed after 12PM, on a weekend or on a holiday; the timeframe will roll-over to 11AM EST on the next business weekday.

If sends the correct items to the address on order and it is refused by the customer, all shipping charges to and from the customer will be deducted from the refund. This includes all shipping charges for any items advertising Free Shipping.

If you find yourself in a special circumstance that requires you to refuse a package, please contact us first for approval.

Adding Additional Items to a Previous Order

We cannot guarantee that requests to add items to previous order will ship with the original order. We will make every attempt to do so but we cannot guarantee it. Additional shipping charges will apply. 

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Be sure to double check your shipping information once you get your order confirmation email.

Unfortunately, every carrier charges additional amounts to either redirect or reship packages due to incorrect addresses. If you omit the correct street address, apartment number, PO box, zip code, etc. we have no choice but to pass on the additional charges to you for the additional cost. This can range from $5 to $35 depending upon the region and the reason. Please contact us as soon as possible if you have entered the wrong address on the order.

Back Orders

Despite our best efforts, particularly popular items can sell out and when this is the case, we will inform you of the expected earliest delivery date. Please inform us should you wish to cancel at any time and you will receive a full refund.

Return Guidelines
No returns on electrical items.

  1. Click Here to request an RMA from your Completed Orders section in the My Account section.
  2. The item(s) must be returned within 30 days of the order date.
  3. Include the original receipt or a copy of receipt with the returned merchandise.
  4. The item(s) must be returned without being used or damaged in any way.
  5. Send the return items PREPAID to our warehouse at:
Returns Department

1375 S. Main St.
Keller, TX 76248

Product Videos

Predator Performance Air Filter with Adapter and Jet Upgrade 03:26

Predator performance engine air filter, carburetor jet with adapter for optimum air flow. #KartRacing #GoKartRepair

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    Predator performance engine air filter, carburetor jet with ad...
  • Changing the j...
    How to upgrade the jet in a go kart carburetor for better perf...

icorating5.png Awesomeness
Posted by James Gagnon on 12th Jul 2016
Switched from a centrifical clutch to this torque converter clutch. What a phenomenal difference off the line. Seriously, the difference in acceleration from a centrifical clutch was like adding a turbo (interesting concept to consider) to the kart.

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