Hedman Block Hugger Headers - 1.5 in Primary - 2.5 in Collector - Black Paint - GM LS-Series - Street Rod 1923-49 - Pair ididit The tiny digital controller inside

The tiny digital controller inside the compact housing gives you the ability to program the rpm activation points through the easy-to-view LED panel and two programming buttons

Also fits all other cars with a round hydraulic fluid reservoir smaller than 3

2011-2018 GMC Sierra 1500

Factory length for '71-'79 Oldsmobile 400-455

Hedman Block Hugger Headers - 1.5 in Primary - 2.5 in Collector - Black Paint - GM LS-Series - Street Rod 1923-49 - Pair ididit The tiny digital controller insideHedman Hedders Block Hugger Headers; Chevy Ls Series; 1 1 2" Tubes; Uncoated The compact, low profile design of Hedman's Block Hugger Hedders is ideal for factory manifold replacement, or engine swap projects that do not have a Hedder designed specifically for the applications. Hedman Hedders Street Rod Block Hugger Exhaust Hedder 68520 Tube Size 1 5 8 in. Collector Size 3 in. Shortie Style Chevy Street Rod 5. 7L LS1 Highest Quality Materials