..... at least when it comes to exhaust piping. Especially on boosted vehicles. Which is why Stainless Works now offers both a 1-7/8" AND 2” primaries on their performance headers for those Gen III Hemi engines. Whether it’s the barnstormer Hellcat or the base model 5.7L. If it has a blower (which it should) or you’re adding one (which you should), then you’ll need to get a set of these 2” American-Made headers from the studs at Stainless Works. As always HPT is hooking our customers up with the products at the best prices so hit us up for a quote today.