Find Parts for Your Vehicle




Tri-Y Headers w/ Connector Pipes, 1973-78 Oldsmobile Class A Motorhome (FWD only), 403-455

$ 741.00

ITEM #: THY-355Y-C
Long Tube Tri-Y Headers with Connector Pipes

1973-78 Oldsmobile Class A Motorhome (FWD only)
403-455 V8

Header Style: 4:2:1 Long Tube Tri-Y Headers
Material: Steel
Finish: Silver Ceramic Coat
Weld Up: Yes, connector pipes must be welded to exhaust system
Primary Tube Diameter (in): 1-3/4"
Primary Tube Gauge: 14 Gauge
Collector Attachment: 3-Bolt Flange
Collector Diameter: 2-1/2"
Tuned: No
Flange Thickness: 3/8"
Bolts and/or Studs Included: Yes
Gaskets Included: Yes
Reducers/Adapters Included: No
Connector Pipes Included: Yes
Connector Pipes Inlet Diameter: 2-1/2"
Connector Pipes Outlet Diameter: 2-1/2"
Catalytic Converter(s) Included: No
Quantity: Sold as a Complete Kit
CARB E.O. #: N/A (pre-1976)
Warranty: Limited Lifetime to original purchaser (see FAQ's for details)

Header Information: Backed by over 50 years of knowledge and experience, our headers are designed to outflow your stock exhaust manifolds by leaps and bounds. These headers will give your engine more horsepower and torque across the entire RPM range, while increasing your gas mileage potential. To make these headers last, we made them out of industry leading T304 stainless steel tubing with 3/8" thick flanges. All of this 100% American made, and backed by our lifetime warranty of course!