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Internal engine upgrades like camshaft, heavy duty valvetrain, etc.
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DDR Sea-Doo Intake Manifold Brace Girdle Riva Sea-Doo 1503/1630 Valve Spring Compression Tool Calas Performance Titanium Retainers (Sea-Doo)
This Intake manifold brace girdle provides heavy duty reinforcement to the intake manifold by giving it added strength that allows it to hold up to higher boost pressures and prevent the intake manifold from splitting at the seam. This part does not require any drilling or cutting of the intake manifold. This brace fits all supercharged Sea-Doo watercraft and we consider it a must-have item for any Sea-Doo 300 and a great precautionary measure for any modified Sea-Doo pushing more than 13 PSI of boost. The RIVA overhead Valve Compression Tool allows easy removal of valve springs and keepers without removing cylinder head. Includes compression adapter to pressurize cylinder keeping valves in place during removal of stock springs and keepers. For use with all Sea-Doo 4-TEC 1503 and 1630 ACE engines. The Calas Performance Sea-Doo Titanium Retainer set includes twelve retainers that are precision machined with high quality military certified Titanium alloy. These retainers are extremely strong, lightweight and add improved wear resistance. The retainers are made to fit OEM factory valve spring set for all Sea-Doo 4-stroke models 2002-2023.
Calas Performance Springs & Retainers (Sea-Doo) Calas Performance Billet Racing Camshaft DDR Billet Intake Manifold for Sea-Doo
Calas Performance Billet Racing Camshaft
Our Price: $799.00
Sale Price: $699.00
Savings: $100.00
Calas Performance Sea-Doo retainers are manufactured with high quality military certified Titanium alloy and are CNC machined for a tight fit. Calas Performance dual valve springs are computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue. We also utilize computer software control. Introducing the ultimate performance camshaft for Sea-Doo engines! Gain 350-450 RPM, 3-5 MPH, and arm stretching acceleration throughout the entire power band with the Calas Performance Billet Camshaft. This cam is precision CNC machined from high strength steel and heat treated for maximum durability and consistent results every time. Champion tested and champion proven! This camshaft is the same one used by multi-time HydroDrag World Champion Ernesto Calas in his personal racing PWC!

Fits all supercharged Sea-Doo PWC 2003-2024 185 HP, 215 HP, 230 HP, 255 HP, 260 HP, 300 HP, 325 HP models.

Requires upgraded valve springs and titanium retainers.
Introducing the DDR billet aluminum intake manifold for Sea-Doo 300 watercraft! This CNC machined long runner manifold is designed for a massive increase in acceleration and top speed gains on highly modified supercharged or turbo Sea-Doo. In our personal testing this manifold gained 3 MPH and shaved more than a half second off of our 0-85 MPH times!


  • Billet CNC machined Intake Manifold for turbo and high RPM supercharged Sea-Doo (9,000+ RPM)

  • Two 1/8 NPT ports for ultimate convenience

  • Original OEM oil dipstick location

  • Flow tested and race tested

  • 100-300 gains in RPM