Andrews TW21 Cams for 1999-2006 Harley Twin Cam

Product Description

Andrews TW21 Chain Drive Cam Set for 1999-2006 Harley Twin Cam

Increase low-end and midrange torque in your Harley-Davidson Twin Cam with the Andrews TW21 Chain Drive Cam Set. Designed as a bolt-in performance cam for street-driven motorcycles, the TW21 is especially well suited for heavier bikes, stock compression ratios and stock pistons where strong everyday torque is more important than high-rpm horsepower.

The TW21 provides a broad, usable powerband of approximately 1,700-4,800 rpm with .498" intake and exhaust lift. Andrews designs these cams for use with stock Harley-Davidson hydraulic lifters and stock valve springs, making them a proven choice for mild Twin Cam 88 and similar street builds. The cams are manufactured from high-quality alloy steel billets and heat treated for strength and durability.

Fitment

• Fits 1999-2006 Harley-Davidson Twin Cam models with the early chain-drive cam system
• Fits select 1999-2006 Harley-Davidson Touring models
• Fits select 1999-2006 Harley-Davidson Softail models
• Fits 1999-2005 Harley-Davidson Dyna models
• Does not fit 2006 Dyna models, which use the later cam drive configuration
• Compatible with carbureted and fuel-injected applications
• 1999 Twin Cam applications require a splined cam drive sprocket
• Verify piston-to-valve, valve-to-valve and valve spring coil-bind clearance during installation

Features

• TW21 performance camshaft grind
• Bolt-in cam design for compatible Twin Cam engines
• Designed for increased low-end and midrange torque
• Excellent choice for heavier Touring and Softail models
• Works well with stock compression ratios and stock pistons
• Approximately 1,700-4,800 rpm power range
• Compatible with stock Harley-Davidson hydraulic lifters
• Compatible with stock valve springs
• Works with both carbureted and fuel-injected engines
• Manufactured from high-quality alloy steel billets
• Heat treated for strength and durability
• Sold as a matched intake and exhaust camshaft set
• Made in the USA
• Andrews Part Number: 288121

Specifications

• Manufacturer: Andrews Products
• Part Number: 288121
• Grind: TW21
• Drive Type: Chain Drive
• Intake Timing @ .053": 10° / 30°
• Exhaust Timing @ .053": 40° / 8°
• Intake Duration @ .053": 220°
• Exhaust Duration @ .053": 228°
• Intake Valve Lift: .498"
• Exhaust Valve Lift: .498"
• Intake Lift at TDC: .134"
• Exhaust Lift at TDC: .121"
• Valve Springs: Stock
• Power Range: Approximately 1,700-4,800 rpm