COMP Cams Thumper NSR Stage 1 Hydraulic Roller Camshaft - Lift 0.541 / 0.530 in - Duration 272 / 291 - 111 LSA - 1800 / 6500 RPM - GM LS-Series Competition Engineering impact-resistant plastic fan shroud can

impact-resistant plastic fan shroud can be custom fit to radiators that are 19" tall x 27"-31" wide

348 in Stud

Fits 1999-2007* (*Classic body) Chevrolet Silverado & GMC Sierra 1500 4

1979 Chevrolet Nova Base CID 305 Naturally Aspirated GAS

Works for Both Automatic and Manual Transmissions:

COMP Cams Thumper NSR Stage 1 Hydraulic Roller Camshaft - Lift 0.541 / 0.530 in - Duration 272 / 291 - 111 LSA - 1800 / 6500 RPM - GM LS-Series Competition Engineering impact-resistant plastic fan shroud canPerfect choice for sound and power in performance truck applications. Budget friendly, No Springs Required (NSR) version of extremely popular Thumpr designs. Vehicle Applications: 2005 2009 Saab 9 7x 2007 2007 Chevrolet Silverado 1500 Classic 2000 2014 GMC Yukon XL 1500 2001 2006 GMC Sierra 1500 HD 2009 2012 Chevrolet Colorado 2003 2006 Isuzu Ascender 2009 2010 Hummer H3T 2002 2016 Cadillac Escalade 2007 2019 GMC Sierra 3500 HD 2011 2017 Chevrolet