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RIVA Yamaha 2018+ SVHO Intake Manifold Upgrade Kit Calas Performance Retainers (Yamaha) Supertech Single Springs & Retainers (Yamaha)
The RIVA Intake Manifold Upgrade Kit enables your SVHO engine to produce more horsepower by delivering increased air flow and boost pressure (+1lb). Precision machined billet sleeve directly replaces restrictive mesh element that is prone to becoming dislodged in OEM plastic intake manifold. Provides improved low end punch and mid-range pull with improved reliability. Includes detailed installation instructions.

Key Features:
  • Delivers more boost pressure & horsepower.
  • Improves reliability by removing OEM mesh that is prone to failure.
  • Billet aluminum sleeve features o-ring design for positive seal.
  • Includes hole saw & cutting fixture for clean installation.
Fits all Yamaha 2018+ SVHO
Calas Performance Yamaha set includes sixteen retainers that are manufactured with high quality military certified Titanium alloy and are CNC machined for a tight fit. Retainers are extremely strong, lightweight and wear resistant. Retainers are made to fit OEM factory valve spring set. Supertech Yamaha set includes 16 retainers that are manufactured with high quality Military Certified Titanium Alloy and are CNC machined for a tight fit. Supertech set includes 16 single valve springs which 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. This combined with our high quality steel alloy enables Supertech valve springs to be more durable in extreme conditions. Supertech Set includes 16 Spring Locators that are manufactured from hardened 4140 Steel Alloy that not only protects the cylinder head casting and shim, but also precisely locates and holds the valve spring in place.