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Sea-Doo 4-TEK Products

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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Testimonials
  • I had another manufacturers"fins" on my boat and never really noticed much improvement in steering. I just replaced them with the Cobra Venom 16x's and I now notice a big improvement at all speeds eve...

    JDW

  • Jeff, the fins work amazing! We went out in 12 mph wind and coming back to the dock usually we'd be sweating it, but with the new fins on, man what a difference! We can't thank you enough, WOW!!! Open...

    Penny Kennedy

  • With some great advice and fast support from Jeff, I installed the fins in about 30 minutes. The Cobra Jet Steering is fantastic. The ski turns on a dime and nice hole shots. While idling in the Marin...

    Ronn

  • i found Jeff's website through a search for upgrades and read the page, then i called Jeff and had a nice conversation relating to the product. i then purchased a unit and have recently operated my sk...

    Jim

  • All I have to say is THANK YOU!! I was going to trade my boat in and your fins made all the difference in the world!! I was scared to drive my boat without these, now I can control my boat and dock it...

    via email to CJS

  • 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

  • All I can say is wow! My wife and I purchased a 2000 seadoo challenger in March. Docking was a nightmare, I was absoulutly scared to death to pull into the launch ramp sometimes even jumping out of th...

    Aaron in Ohio

  • 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

  • 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

  • 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

  • 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 purchased the SeaDoo Jetboat primarily because the waters here in Bradenton are so shallow. Jeff put on the steering mod and the handling is so much better. It has maneuverability at idle whereas be...

    David Cooper

  • 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

  • Finally got to test out the CJS Viper steering system I purchased. I can’t believe the difference it makes in the handling of my Yamaha 190 FSH especially at idle speeds, maneuvering is now a breeze...

    John & Pam

    johnpammo@hughes.net
  • 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

  • 2017 212 Ltd S with Articulating Keel

    I emailed Jeff ahead of ordering and he quickly answered all my questions. Several emails were exchanged and I got all the answers. I order the...

    Allen Franke

  • Fins are working great! Wow, what a difference. Install went smoothly. I would recommend the fins to any jet boat owner! Thanks Jeff!

    Derek Dial

  • Working as intended. Maneuvering around the docks is a blast now. I no longer look like a boob bouncing off stuff. Thanks.

    David Wisley

  • From a former Moto-X 250 rider...Here is my testimonial.. I hate it! Yes that's right I hate it but love to hate it. Before I found your device, I was slipping sliding and working extra hard to keep m...

    Rich Walkup

  • After lots of research and reading on this website I decided to put Cobra Venom steering fins on my 2012 242LS. I wouldn't say I'm an "experienced" boater. I did own an entry level Regal bow...

    via email to CJS

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