Kawasaki 440 / 550 Hull Extensions
$190.00
Kawasaki 440 / 550 Hull Extensions the replace the stock caps adding an extra 1″ to reduce porpoising and improve turning grip. Rear exhaust hole is built in.
Description
Kawasaki 440/550 hull extensions come out an extra 5/8″ to grab the water longer for a reduction in porpoising and increases the rear grip. These improve the overall handling of the ski. These are a direct replacement of the badly-designed OEM hull caps that fill with water and sand. Hardware is included with the kit.
Sold with pre-molded rear exhaust hole for those with this outlet configuration.
What You Need to Know:
- For the warranty, you need to install this product with our approved silicone. Apply silicone to all the edges and wipe off any excess from the surface of the product. Smooth out any excess silicone along the edges as well. Allow the silicone 24 hours to cure.
- For the rear exhaust port, the rivets may need to be drilled out or the head of the rivet shaved down to install these extensions. Looking at the alignment of the extension to your hull will indicate what you need to do.
- If you do not have the rear exhaust, the molded-in exhaust hole will sit off the hull a little bit. You can seal the edges with silicone
- This product fits: Kawasaki 440 / 550 (all years)
- Installation time: 1-2 hours
- Do you sell extensions without the exhaust hole?
No, all our extensions have the exhaust outlet hole. - Do you offer these in another color?
No, our material only comes in black. But you can paint them just like any plastic part. We strongly recommend keeping the bottom and side surface matte for performance. - Is this part legal to race with?
You will need to check the rules from your racing organization to verify if this part is legal for competition. ProWatercraft takes no responsibility if you are disqualified from this part breaking any racing organization rules.
5 reviews for Kawasaki 440 / 550 Hull Extensions
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Bill Kinnison (verified owner) –
Less porpoising, easier to get the bow to settle down when going over boat wakes, looks cool. Super easy install.
Thanks guys!
Matt Miller (verified owner) –
Installed on my 550sx. Looks great. Eliminates horrible stock caps that hold water. Nice upgrade.
Kevin Knopf –
Awesome addition to the ski, my old stock end caps were getting water in them. Simple install and awesome grip after!
Ryan McIntyre (verified owner) –
Be aware of what this product IS and ISN’T: this IS a handling upgrade that will improve cornering lean angle, transition speed side to side, and adds a bit of downforce at the rear to improve front end grip. This IS an improvement over the stock part. This IS cool looking. This IS NOT a stability upgrade; the cutouts at the rear corners allow for a bit of side-to-side rocking that is noticeable but not intrusive with any standard aluminum ride plate. When used with the ProWaterCraft ride plate the wobble is actually distracting. That said, it’s a great part that has very much improved the cornering intensity of each ski I used these on, but eroded confident, stable handing to the point guests did not enjoy riding the skis with extensions. I would still recommend this part, but only to those who want a craft that corners faster and harder at the sacrifice of some stability.
Jacob –
Added these with the pro watercraft ride plate. Fantastic upgrade for those with an engine swap or heavier rider. I have a 650 in my ski and before I was completely stock. It porpoises like no other with me at 150lbs. But once I added these it was almost gone completely. It does not help stability of the rear end which I actually like. I love how these with the ride plate keep the original characteristics of the body. It’s something no other ski can do. Other than the porpoising there is nothing else noticeable they do for me. But that’s all I wanted. With that engine it now feels like it could have come like that out of the factory. Not built in a garage. Fantastic product for anyone who wants to keep the stock feeling of the ski in corners. Now for installation after you get the stock ones off it’s super easy. The trick to it is get them super hot. Like melting the paint hot. Then take a screwdriver and position yourself facing the back of the ski and go at like a 10 degree angle. If you go perpendicular you will puncture the ski. The 10 degrees and trying to get behind it is your best bet. Not press to hard. Repeat all the way around each one and they should start to come out.