OSDmarine Sea Doo SPARK 2.5" Free Flow Exhaust and RIVA Water Box Combo

  • Model: OSD6499
  • Shipping Weight: 10lbs
  • 1 Units in Stock
  • Manufactured by: OSD

$519.99

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It's taken some time to source the best parts for this one, but it's finally here! Our OSDmarine Freeflow Exhaust Kit utilizes the stock exhaust outlet location and requires no mods to your craft, while featuring the largest diameter pipe size in a free flow kit yet. Pretty much every free flow kit out there is 2.25" pipe (even Riva), but by adding this 2.5" free flow kit with RIVA Water Box and the proper tuning, you'll get improved performance. And with the larger diameter and unrestricted design, this kit gives a great exhaust sound too! It features mandrel bent Polished Stainless pipe and stainless clamps as well as a 90 degree exhaust outlet that utilizes your exhaust nut which saves you some on the cost of a kit. The high temp three ply reinforced silicone coupler and elbow are reported to hold up to backfires & overheats too. Fits both 2 & 3 passenger Sea Doo SPARK - All Models.

Included In This Kit...

  • Riva Spark Water Box - p/n RS16131
  • OSD Marine Freeflow Exhaust - p/n OSD6496

Note due to the nature of parts suppliers, the curved and straight hoses might not exactly match each other in color, thickness, or appearance but that doesn't affect function.


OSD FREEFLOW EXHAUST / RIVA WATER BOX INSTALLATION PROCEDURE

To install our OSD Freeflow exhaust, you of course first have to split the hull and remove the back upper deck to expose the exhaust components. We won’t cover that here since there’s plenty of other sites and youtube for that. This kit reuses the large exhaust nut that attaches the lower resonator pipe through the hull. Step by step…

  1. Remove the stock resonator and water box from the craft.
  2. Install the oem temp sensor in the Riva Water Box, sealing with pipe sealant or teflon tape.
  3. Install the Riva Water Box and tighten the large oem exhaust clamp.
  4. Locate the 90 degree exhaust fitting that came in the OSD kit and install it in the exhaust outlet opening using the provided gasket on the part of the fitting facing inside of the hull and the large exhaust nut goes on the outside. Until the exhaust positioned is right, just leave that nut slightly loose so you can move the elbow.
  5. Install the 2.5” end of the 135 degree silicone elbow on the stainless pipe at the approx angle shown in the pictures.
  6. With the 2.75” end of the 135 degree elbow installed on the RIVA water box outlet fitting, position/twist the stainless pipe in the elbow so it aligns with the exhaust elbow. Once it’s right, you can install the larger 2.75” clamp as well as the 2.5”clamps to secure hoses to the waterbox and stainless pipe. To ease installing these clamps, I like to leave the 2.75” one lying on the waterbox fitting before I install the 135 elbow / ss pipe assy on the waterbox fitting.
  7. Once you have the 135 elbow where you want it on the ss pipe, you can remove the assy from the waterbox and install the straight coupler hose half way on the other end of the ss pipe and clamp with one of the included clamps. Then reinstall the freeflow assy on the waterbox and exhaust elbow fittings and clamp the straight coupler to exhaust elbow and 135 elbow to waterbox. That should give you a complete assy with correct alignment.
  8. Now tighten the exhaust elbow nut. Once its tight to the point the elbow won’t move when you try and move it and rubber flange gasket compressed against the hull, you should be good. Then to finish, use a small drillbit in a power drill and drill a pilot hole for the nut lock bolt. Then reinstall the nut lock bolt through nut and fitting to be sure the nut doesn’t come loose.

This product was added to our catalog on Monday 20 January, 2020.

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