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THY-375Y-S-C / 1968-77 Chevelle / El Camino / 1970-81 Camaro-265-400 SBC Long Tube Tri-Y Headers (1/

Availability: out of stock

Header style
Weld up
Carb EO #
Yes: D-540-5
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ITEM #: THY-375Y-S-C

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Long Tube Tri-Y Headers with Adapters
1968-77 Chevelle / El Camino
1968-74 Nova
1970-81 Camaro
265-400 Small Block V8 (with smog pump fittings)
Part# THY-375Y-S-C

Technical details

Application Specifics: Fit with factory or aftermarket A/C | 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
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
Y-Pipe (Crossover) Included: No
Weld Up: Yes, adapters must be welded to exhaust system
Quantity: Sold as a Pair
CARB E.O. #: D-540-5 (1980-1987 AMARO/PASS CARS 262-400 ENGINES)
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 them 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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