ANDREWS - 288121 - Cam Set - TW21 - Chain Drive - Twin Cam
The ANDREWS 288121 is a pair of TW21-grind cam sets for 1999-2006 Harley-Davidson Twin Cam engines, forged from alloy steel billets and computer-designed with heat-treated strength, delivering 255° intake duration (0.498" lift) and 264° exhaust duration (0.498" lift) for a street riding character — made in the USA.
Features
- Manufactured with the help of a computer with cam design capabilities
- Made from alloy steel billets and heat-treated processes are utilized
- Made in the USA
- Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance.
- '00-'06 model cams use a splined cam drive sprocket, for '99 a splined cam drive sprocket is required.
Specs
- Exhaust Lift: 0.498"
- Intake Lift at TDC: 0.134"
- Intake Lobe Centerline: 100°
- Grind: 21 Series
- Exhaust Close: 8°
- Exhaust Duration: 264°
- Riding Style: Street
- Units: Pair
- Application: Intake
- Exhaust Lift at TDC: 0.121"
- Intake Close: 30°
- Intake Duration: 255°
- Product Name: Cam Set
- Exhaust Open: 41°
- Intake Lift: 0.498"
- Type: Chain Drive
- Application: Exhaust
- Exhaust Lobe Centerline: 106°
- Intake Open: 10°
Frequently Asked Questions - ANDREWS - 288121 - Cam Set - TW21 - Chain Drive - Twin Cam - '99-'06 Harley-Davidson
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
