Proform B/RB/Big Block Engines 440-811 2001-gmc-sierra-1500-esi8707626 This Mishimoto thermal bypass valve

This Mishimoto thermal bypass valve eliminates the internal thermostat

Universal tray-style battery box sized for batteries approximately 12in long x 7-1/4in wide

Full 1-7/8" Port-Matched Primary Tubes with Merge Spikes — Maximum flow from cylinder head to collector for aggressive Coyote swap performance

00 Mount Type Uses New Hangers (Not Included) Muffler Series Super 44 Series Product Type Street Mufflers Vehicle Type Street/Strip Vehicle Type Truck/SUV Vehicle Type Street Rod Vehicle Type Classic Muscle Car Vehicle Type 4/6 CYL Engine Vehicle Type Late Model Muscle Car Warning California Proposition 65 9957 Slip-Fit 9958 Slip-Fit part type Exhaust Muffler Sub Category Mufflers

Proform B/RB/Big Block Engines 440-811 2001-gmc-sierra-1500-esi8707626 This Mishimoto thermal bypass valveHere's a look that's new, and eye catching! The vintage MOPAR emblem has been stamped into these valve covers, then hand painted with a shade of blue matches engine blocks from the era. Oil restricting baffles are pre installed. All valve covers are sold in pairs, and come equipped with air breather and PCV grommets, unless specified otherwise. Proform B RB Big Block Engines 440 811 Specifications: PCV Grommet Included Yes 14 21. 5 14 546 3515 0. 125