Mustang Mach 1 1999-2004 Long System

If your high powered Mustang Mach 1 needs superior headers, go with the brand that leads the way in performance and quality. With primaries in 1-3/4" and 1-7/8", we have you covered from bone stock to over 1000 RWHP. All 1-3/4" long system x-pipes come with a factory 2-1/2" rear ball socket connection. 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 severe duty 300 cell catalytic converters with the option to upgrade to 400 cell G-Sport catalytic converters. Call before ordering to upgrade. Attn. All ARH products are exclusively manufactured for racing purposes. Installing these products on any vehicle eliminates the legal use, in any capacity, on public roads/highways and may be subject to fines and/or criminal liability as per the Clean Air Act.