The American Racing Headers Long System for the 2012 to 2013 5.0L Boss Mustang takes this car's amazing road course performance to another level. Our Long System provides substantial performance benefits and allows you to keep the Boss side pipes. Available in 1-3/4", 1-7/8" and 2" primaries. Expect 28 RWHP gains before tuning and great sound.

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

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.