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4-TEK

The following products are designed for use with your Sea-Doo Jet Boat or boat equipped with a Sea-Doo 4-TEK engine

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If you still have questions, feel free to contact me at jeff@cobrajetsteering.com

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Sort by Position Name Price Watercraft
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Testimonials
  • Testimonial for the Mercury Optimax system:

    Thanks much. Your invention saved my relationship! (with my new/used jet boat). During 15 years of owning two I/O's, I was careful (and ...

    email to CJS

  • Oh my god! Jeff I wanted to send a note to thank you for several reasons. First your communication has been flawless, I ordered the fins last weekend. You responded immediately! Second, you sourced ch...

    Bill Haley

  • Customer review sent to me on the new Ultimate A K steering with mega fang plus compared to the thrust vector steering on a 21 foot yamaha the articulating kee...

    email to CJS

  • Just got back from towsurfing one of the outer reefs - wasn't real big but double to triple overhead (15 to 20' faces) and the ski worked GREAT! Comin' in hot to pick up my partner after he wiped out ...

    Peter

  • Testimonial from a 2013 - 19' Yamaha jet boat owner who had the Viper NK with the Mega Fangs and upgraded to the Mega Fangs Plus...

    Just got back from a great day on the gulf and hav...

    via Email to CJS

  • Absolutly fantastic!!! It was like having power steering. It does everything it is advertised to do and more. At full speed before it was installed, it took some force to turn it. Now I can turn using...

    Rick Hopper

  • Well, I installed and tested the new FANGS today. In a word: awesome. Ordering and delivery - I had the item at my door exactly two days after I paid an invoice for paypal transaction. Shipping is inc...

    via email to CJS

  • I can't say how much I enjoy your product ,excellent all around slow, fast, docking or pulling, just great engineering and fabricating thank you so much!

    Timothy O'Brien

  • Hi Jeff - I installed the Cobra Jet Venom Ultimate fins last week. The difference in handling is night and day. Prior to the installation, my 2014 Yamaha SX 190 was very hard to steer at low speed bec...

    Pete Brown

  • It's hard to believe that such a small incremental expense can drastically change the overall performance of the entire experience. I am not a professional rider, in fact this is my first ski. I had i...

    Brad Buchmann

  • After doing some research on my boat before I purchased it, I came across the Cobra Steering System. All I can say is WOW!!!. This product does give you a better feel and very quick response from the ...

    Josh Holbrook

  • I don't know how you figured out how to do this .But what a difference it made on my gsx.I enjoyed this ski accept for the loss of control at high speed . If I turned fast it would loose its bite and ...

    Bill

  • I tried your steering kit on my quick-handling XP. I am amazed that something that looks small and inconsequential can make such a difference. This ski can be punishing in chop and at high speed becau...

    Bill Baker

  • Been meaning to chime in and tell you guys how awesome the Viper unit is. I now have 2 seasons with the 16 192 and wifey has only driven once for literally minutes. She just keep saying I can't keep t...

    via post on a jet boat forum

  • I need to share my recent experience with you and visitors to your web site. As you know I have had your steering system on my sea doo for nearly as long as I have had it, about two years. My girlfrie...

    David

  • I am the individual who allowed my 2004 sea doo to be photographed and displayed on this web site. I consider myself to be a serious jet skier and have been for nine years. After purchasing my newest ...

    Ed

  • I have the CJS venom viper kit and I can assure you the kit performs exceptionally well. The attitude of the boat is completely changed on plane. It cuts through the water rather than on top. No mor...

    via JetBoaters.net Forum

  • I spent 7 hours on the lake today fishing. The Viper is the single best piece of equipment I've purchased for this boat. I highly recommend it. Spent a lot of the time at idle fishing and can say ...

    from JetBoaters.net forums

  • As new jet skiers, we were thinking that the ski would be very unstable and sort of like "riding a rocket." When we first launched our jetski with the steering installed, we were amazed at h...

    Charlie and Sue

  • I recently purchased the Cobra Jet Steering for my polaris after Jeff informed me of the capabilities that this would give any rider on my ski. I personally was tired of the fact that the Polaris woul...

    Dan Solie

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