98-17 BIG TWIN CLUTCH SPECS
- Includes 10 race proven material friction plates on 6061 T6 aluminum cores, 9 tempered steel drive plates and a 10% stronger than stock diaphragm spring
- Pre-measured stack height for easy, accurate installation
- Perfect for Hot Street or Strokers!
- 11% MORE SURFACE AREA THAN STOCK
- Includes performance diaphragm clutch spring - Part No. BT-16
91-21 XL AND 90-97 BIG TWIN CLUTCH SPECS
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Includes 9 race proven material friction plates on tempered steel cores
- Starburst groove pattern for maximum heat dissipation & oil circulation
- Included are 8 tempered steel drive plates
- Pre-set stack height for easy installation
- 15% more clutch area for high performance strokers
- Remove OEM rivet plate! Includes new diaphragm clutch spring 15% stronger than stock
