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Okay folks... what is the consensus numbers on what a good set of 1 3/4” primary long tubes (Kooks, ARH, etc) will get you on an basically (maybe a CAI and a cat back) stock L83? Info/numbers on catted vs non-catted would be cool too. So would before and after tuning... even though it’s pretty much a given that you need a tune if you do long tubes. Thanks y’all!
American Racing Headers Part number :GM62-14178300LSWC GM Truck 6.2L 2014-2019 Long System These have 150 miles on them. Like new! Cost $1,775 new. Passing a smoking deal on to you. Comes with all components originally sold as a kit from American Racing. ARH long tube headers long system for the 2014-2016 Chevy/GM Truck 6.2L features 304 stainless steel, 1-7/8" primaries, 3" merge collectors, and all the necessary hardware and gaskets for a bolt-on installation. The 2014 & Up GM Truck 6.2L ARH long systems were designed to bolt-on to your factory axle-back or any aftermarket axle-back. Some modification may be required. The American Racing headers require a crossover y-pipe assembly and have converters. Using the catted crossover pipe cause very little restriction and they help to control emissions. Product features on this system includes: 100% Made in the USA - Never Outsourced Made entirely of 304 stainless steel 3/8" thick laser-cut flanges for a warp-free seal Hand-ported TIG welded inlets Optimized primary tube routing for superior fit and performance Merge collectors with scavenger spikes Catted systems feature 200 cell metallic substrate catalytic converters for extreme durability