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THY-311Y-C / 1955-1957 Chevy Bel Air Long Tube Tri-Y Headers 265-400 SBC V8

Availability: out of stock

Header style
Weld up
Carb EO #
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ITEM #: THY-311Y-C

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Long Tube Tri-Y Headers with Adapters
1955-57 Chevrolet Bel Air, Nomad, 210
265-400 Small Block V8
Part# THY-311Y-C

Technical details

Application notes: Fit with bell housing or side motor mounts | Fit with straight or angle plug heads | Will not seal properly on D-port cylinder heads

Header Style: 
4:2:1 Long-Tube Tri-Y Headers
Material: Steel
Finish: Silver Ceramic Coated
Weld Up: No
Primary Tube Diameter: 1-5/8"
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
Adapters/Reducers Included: Yes
Connector Pipes Included: No
Catalytic Converter(s) Included: No
Quantity: Sold as a Pair
CARB E.O. #: N/A
Warranty: Limited Lifetime to original purchaser


Backed by over 50 years of knowledge and experience, our headers are designed to outflow your stock exhaust manifolds by leaps and bounds. Tri-Y (or 4 into 2 into 1) style headers by design will increase the power of your motor across the widest RPM band possible. That is the beauty of the design, and that is why they are the best street header available. To make these headers last, we built them using industry leading 14-gauge mild steel tubing with 3/8" thick flanges. Topping all of that off, all of our headers come beautifully ceramic coated to greatly reduce under-hood temperatures and protect the headers from the environment. All 100% American made, and backed by our lifetime warranty of course!

Unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer. This includes components like cylinder heads, chassis, steering, motor mounts, body mounts and bushings, etc. If your vehicle is using aftermarket components, parts from other applications, or custom altered parts, then it is the installer's responsibility to verify fitment.


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