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GM Performance Parts
Big Block Chevy V8 Clutch Pressure Plates/Discs

10148045
11" OD Clutch Disc
$1
78

Heavy-duty woven face, 10 tooth spline. Originally used with 1967-70 special high-performance engines.  
Technical Notes: Use with pressure plate P/N 3884598 for off-highway applications with coarse spline transmission input shaft. Left to right: 3884598, 10148045

12353956
Clutch and Pressure Plate Assembly (10.4" Diameter)
$523

The Centerforcer Dual Friction Clutch represents a major design improvement in clutch and pressure plate assemblies, offering both ease of operation and high-performance characteristics. A specially engineered system of weights attached to the diaphragm spring keeps the diaphragm from sticking "over center" at higher RPM shifts, interlocks diaphragm spring fingers for a more positive, faster engagement and increases "clamp load" pressure as the engine RPM increases. These heavy duty off-road clutch kits include the disc and pressure plate.  
Technical Notes: This unit includes both the clutch cover and disc (10.4"), with 10 tooth spline design. Kit includes one cover and one disc.

12353957
Clutch and Disc ASM by Centerforcer
$discontinued
1965-74 all models with 396,427,454 engines with 10.4" clutch. This unit is used when a transmission conversion as been made from a 10 spline input shaft early model to later model with a 26 tooth spline.  
Technical Notes: This unit includes both the clutch cover and disc with a 26 tooth spline and has 2,500 lbs. clamping pressure.

3884598
Clutch Cover
$230
Heavy-duty 11" diameter diaphragm clutch for off-highway use. Originally used with 396/427/454 special high-performance engines.  
Technical Notes: Use with 14" diameter flywheel P/N 3993827 , P/N 14096987 and P/N 3991469.

838653
Clutch Cover Bolt
$3
3/8-16 x 1"