Skunk2 312-05-0200 Lost Motion Assembly for Honda B-Series VTEC Engines Product Features This is not compatible with B-Series non-VTEC engines Each lost motion assembly kit includes a set of 8 assemblies for an entire Honda DOHC VTEC B-Series 4-cylinder engine (Type-R/GSR B16A B17A B18C) Each chrome silicone steel spring features a hardened tip for added durability Product Specifications Brand: Skunk2 Racing Model: 312-05-0200 Item Weight: 6.4 ounces Product Dimensions: 4.7 x 2.4 x 0.7 inches Item model number: 312-05-0200 Manufacturer Part Number: 312-05-0200 OEM Part Number: SKU-312-05-0200 Shipping Weight: 6.4 ounces Domestic Shipping: Item can be shipped within U.S. Date First Available: May 16, 2013 Why Buy From JandJ Ultra? Highly Trusted Seller Over 99.7% Positive Feedback FAST Shipping and Tracking HUGE Discounts Excellent Returns Policy The BEST Customer Service Shipping & Returns We Ship International! 14 Day Money Back Return Policy Items Ship within 24-48 Hours Product Description The Skunk2 lost motion assembly is an advance spring device that is designed to put pre-load on the center portion of the VTEC rocker when it is in the unlocked position (when VTEC mode is disabled). During extended operating conditions, the contaminants in the oil will more than likely cause the piston to seize resulting in the VTEC rocker rattling when VTEC is not engaging or when the vehicle is in idle. Each Skunk2 lost motion assembly is manufactured exclusively from chrome silicone steel using the latest 3D CAD (Computer Aided Design) modeling and FEA (Finite Element Analysis) to ensure maximum optimization. Each chrome silicone steel spring features a hardened tip for added durability. Skunk2 engineers then tested and proved their design on the engine dyno as well as the race track. Skunk2 lost motion assembly kit replaces the OEM factory piston design with an improved design commonly found in new generation Honda engines. Lost motion assembly springs are required when installing Skunk2 Pro Series camshafts. Each lost motion assembly kit includes a set of 8 assemblies for an entire Honda DOHC VTEC B-Series 4-cylinder engine (Type-R/GSR, B16A, B17A, B18C). Thank You For Your Business!