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Hot Racing STRXF39W05 S2 5mm Spring Steel Stub Axles (2) Traxxas TRX-4
Case Size: 2
One One Way Bearing
to the modeler
Hpi Racing 1444 Underhead N Accessories Hot Racing STRXF39W05 S2 5mmHpi Racing 1444 Underhead This is a genuine HPI Racing replacement underhead for compatible HPI nitro engines. The underhead sits between the cylinder head and the sleeve, forming the combustion chamber surface and helping transfer heat away from the top end. A damaged or worn underhead costs compression and consistency, so this factory spec part is the correct fix during a top end service. Genuine HPI Racing replacement part #1444 Engine underhead
