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THUNDERMAX CHAIN DRIVE CAMS BY RED SHIFT

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Features

  • The stroked crankshaft in 07-09 Twin Cam models changes the dynamic from previous Twin Cam 88 engines, making correct cam choice crucial to avoid engine-damaging detonation from today’s lessening fuel quality
  • Choose cam grind to match engine configuration
  • Ground from one-piece 8620 steel billets
  • Provide smooth, linear power with great valvetrain dynamics
  • Require adjustable pushrods
  • Great bolt-in upgrade for stock 96” or 110” engines in 07-08 Twin Cam
  • Increase torque and horsepower across the board
  • No headwork required
  • Max power grind for 07-08 larger-displacement engines
  • Broader timing for higher-compression engines
  • Complement high-flow heads, intake and exhaust
  • Headwork required
  • Strong performer for 07-08 103” conversion engines with flat-top pistons and stock 96” heads
  • Provide smooth power without detonation
  • Broader timing for lower cranking compression
  • No headwork required
  • Max torque grind for 07-08 larger displacement with heavy payload
  • Narrower timing for more low-end grunt
  • Work well with bagger exhaust
  • Headwork required

Images

THUNDERMAX CHAIN DRIVE CAMS BY RED SHIFT



Part Number Description Suggested Retail
0925-0189  FITS: 07-09 TWIN CAM, STYLE: 575S CAMS, TYPE: 96” AND 110” ENGINES, INTAKE OPENING @ 0.053": 25, EXHAUST OPENING @ 0.053": 49, INTAKE LOVE CENTER (DEGREES): 98, EXHAUST LOBE CENTER (DEGREES): 105, INTAKE CLOSING @ 0.053": 41, EXHAUST CLOSING @ 0.053: 17, INTAKE DURATION (DEGREES): 246, EXHAUST DURATION (DEGREES): 246, INTAKE LIFT @ TDC (INCHES): 0.201, EXHAUST LIFT @ TDC (INCHES): 0.162, INTAKE LIFT (INCHES): 0.575, EXHAUST LIFT (INCHES): 0.575 - 575S cams   $349.95 
0925-0190  FITS: 07-09 TWIN CAM, STYLE: 577S CAMS, TYPE: 103” ENGINES, INTAKE OPENING @ 0.053": 25, EXHAUST OPENING @ 0.053": 50, INTAKE LOVE CENTER (DEGREES): 100, EXHAUST LOBE CENTER (DEGREES): 104, INTAKE CLOSING @ 0.053": 47, EXHAUST CLOSING @ 0.053: 23, INTAKE DURATION (DEGREES): 252, EXHAUST DURATION (DEGREES): 252, INTAKE LIFT @ TDC (INCHES): 0.214, EXHAUST LIFT @ TDC (INCHES): 0.198, INTAKE LIFT (INCHES): 0.577, EXHAUST LIFT (INCHES): 0.577 - 577S cams   $349.95 
0925-0191  FITS: 07-09 TWIN CAM, STYLE: 647S CAMS, TYPE: 113” ENGINES, INTAKE OPENING @ 0.053": 26, EXHAUST OPENING @ 0.053": 58, INTAKE LOVE CENTER (DEGREES): 106, EXHAUST LOBE CENTER (DEGREES): 106, INTAKE CLOSING @ 0.053": 58, EXHAUST CLOSING @ 0.053: 26, INTAKE DURATION (DEGREES): 264, EXHAUST DURATION (DEGREES): 264, INTAKE LIFT @ TDC (INCHES): 0.211, EXHAUST LIFT @ TDC (INCHES): 0.211, INTAKE LIFT (INCHES): 0.647, EXHAUST LIFT (INCHES): 0.647 - 647S cams   $349.95 
0925-0192  FITS: 07-09 TWIN CAM, STYLE: 657S CAMS, TYPE: 107” AND LARGER ENGINES, INTAKE OPENING @ 0.053": 27, EXHAUST OPENING @ 0.053": 52, INTAKE LOVE CENTER (DEGREES): 99, EXHAUST LOBE CENTER (DEGREES): 104, INTAKE CLOSING @ 0.053": 45, EXHAUST CLOSING @ 0.053: 27, INTAKE DURATION (DEGREES): 252, EXHAUST DURATION (DEGREES): 258, INTAKE LIFT @ TDC (INCHES): 0.228, EXHAUST LIFT @ TDC (INCHES): 0.217, INTAKE LIFT (INCHES): 0.657, EXHAUST LIFT (INCHES): 0.650 - 657S cams   $349.95 

Descriptions and notes

Note: All numbers shown are calculated using stock (1.62”) rocker arm ratios. Recalculate if using higher rocker arm ratios. Note: Legal in California only for racing vehicles which may never be used upon a highway.

This item appears on page 446 of the Fatbook