Smeding Diesel T4 2 PC Exhaust Manifold Programmers & Chips~Programmers & Tuners This groove positively retains the

This groove positively retains the O-ring

1998 Chevrolet C1500 Cheyenne

2016 Lexus LX570 Base

slower turbo spool

3500 was engineered to minimize air restriction and flow better than stock

Smeding Diesel T4 2 PC Exhaust Manifold Programmers & Chips~Programmers & Tuners This groove positively retains theSmeding Diesel T4 2 PC Exhaust Manifold 3rd Gen Style T4 Manifold HIGH DUCTILE IRON FOR SUPERIOR STRENGTH PRESSED HYDRAULIC JOINTS FOR LEAK FREE CONNECTION GUARANTEEING NO LEAKS AT ALL TEMPERATURE RANGES. HIGH DENSITY GREEN SAND CASTING MOLD FOR OPTIMAL PORT FLOW FOR PEAK PERFORMANCE CBM MACHINED SURFACES FOR TRUE FLATNESS ADDED GUSSETS FOR SUPERIOR STRENGHT.