Mack 5165 Exhaust Manifold

• Mack E6/E7 select 1970-2003
• Replaces OEM# 104G5194AM and 104GC5165M
  

Increases fuel Mileage by .2-.3 MPG, has ceramic coating to reduce heat absorption and improves air velocity, lowers EGT's 80-100 F and manifold temps 300 F, less turbo lag and offers a 3 year warranty on any cracks or warping.