DOUG THORLEY Tri-Y 4:2:1 Long Tube Headers, 1-3/4" x 3" x 2-1/2" (1955-1957 Bel Air & Nomad LS)

Header Style: 4:2:1 Tri-Y Headers
Material: Steel
Finish: Silver Ceramic Coated
Weld Up: Yes, adapters must be welded to exhaust system
Primary Tube Diameter: 1-3/4"
Primary Tube Gauge: 14 Gauge
Collector Attachment: 3 Bolt Flange
Collector Diameter: 3"
Tuned: No
Flange Thickness: 3/8"
Bolts and/or Studs Included: Yes
Gaskets Included: Yes
Adapters/Reducers Included: Yes, 3" to 2-1/2"
Y-Pipe (Crossover) Included: No
Motor Mounts Included: No, contact us if you need recommendations
Quantity: Sold as a Pair
CARB E.O. #: N/A
Warranty: Limited Lifetime to original purchaser

Tri-Y Headers with Adapters
1955-57 Chevy Bel Air / Nomad / 210
4.8L-6.2L LS Motor Swap