421-06-9072 8 1/2" Diameter8 1/2" Diameter for Stainless Steel Race or "T" tanks. (Sold Each)
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421-04-6235 Thermostat Housing 3/4" NPT Thermostat housing 3/4" NPT without bypass
These polished stainless steel thermostat housing are designed to work with our water crossovers on Chevy small block and big block.
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421-04-6225 Thermostat Housing 1" Pushon Thermostat Housing 1" Pushon without bypass
These polished stainless steel thermostat housing are designed to work with our water crossovers on Chevy small block and big block.
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421-04-6220 Thermostat Housing 1" Pushon w/bypass Thermostat housing 1" Pushon with bypass
These polished stainless steel thermostat housing are designed to work with our water crossovers on Chevy small block and big block.
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421-04-6230 Thermostat Housing 3/4" NPT with bypass Thermostat housing 3/4" NPT with bypass
These polished stainless steel thermostat housing are designed to work with our water crossovers on Chevy small block and big block.
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421-MP-65 Thin Nyloc Nut 1/2”-20 Thread, 18-8 SS
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421-MP-51 Thin Nyloc Nut 3/4”-16Thread, Polished, 18-8 SS
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421-MP-50 Thin Nyloc Nut 5/8”-18 Thread, Polished, 18-8 SS
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421-MP-66 Thin Nyloc Nut 7/8”-146Thread, Polished, 18-8 SS
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421-04-6001 Through Hull Water Pickup.1 1/4" push-on through hull, cut to length pickups.
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421-04-6100 Through Hull Water Pickup-16 male fitting through hull, cut to length pickups.
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421-10-4020 Thrust Bearing (Clutch Spring)
2 per Upper Gear Assembly
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421-10-4044 Thrust Bearing (Gear)
2 per Upper Gear Assembly.
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This Part has options, please click the button below to order.
421-10-5045 + Option(s) Thrust Race (Specify Thickness)
2 per Upper Gear Assembly, one in the cap, one in the case.
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421-01-2590 Thrust Washer (.109 Thick)
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421-01-6579 Thrust Washer (7/16" Prop Adaptor)
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421-02-9189 Thumper ECM Bracket - Must order 1 of each bracket per engine. Also used with Powerflow LS Chevy exhaust.
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421-RGKT Thumper Manifold to Riser Gasket (each)
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This Part has options, please click the button below to order.
421-TP-82KB Thumper Power - Black Big Block Exhaust System w/Shift Bracket
Are your cast iron manifolds failing? This could be
the answer. A cost effective lightweight entry level
performance system. This system was designed for efficiency
and reliability on stock originally equipped engines. Not
silent choice compatible.
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421-TPS82KBS Thumper Power - Black Small Block Exhaust System w/Shift Bracket
Here's an easy lightweight replacement for that
heavy cast iron stock system. This entry level
performance system is designed for stock engine application seeking
a slight performance increase as well as weight
reduction. Not silent choice compatible.
This kit includes the shift bracket.
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