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Doug Thorley Tri-Y Headers 376Y1C

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Headers, Tri-Y, Steel, Silver Ceramic Coated, Chevy, Small Block, Pair

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Manufacturer's Part Number: 376Y1C
Part Type: Headers
Summit Racing Part Number: DTE-376Y1C

Header Style: Tri-Y
Header Material: Steel
Header Finish: Silver ceramic coated
Weld-Up: No
Primary Tube Diameter (in): 1 5/8 in.
Collector Attachment: 3-bolt flange
Collector Diameter: 2.500 in.
Tuned: No
Primary Tube Gauge: 14-gauge
Flange Style: Standard
Flange Thickness (in): 3/8 in.
Bolts/Studs Included: Yes
Gaskets Included: Yes
Reducers Included: No
Cross Over Pipe Included: No
Catalytic Converter(s) Included: No
Motor Mounts Included: No
Transmission Mount Included: No
Quantity: Sold as a pair.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

Thorley headers are designed to outflow your stock exhaust manifolds. These headers increase gas mileage and give your engine more horsepower across the entire rpm range. The Tri-Y configuration builds the most power in the middle rpm range, which is great for towing and steep grades. To make these headers last, Thorley made them out of durable 14-gauge mild steel with 3/8 in. thick flanges and 5/16 in. collector rings. To prevent leaks, these headers have an O-ring welded into the flange, in addition to the high-temperature gasket provided. 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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1 Customer Reviews for Doug Thorley Headers 376Y1C - Doug Thorley Tri-Y Headers

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Excellent performance

Summit RacingSummit Racing Verified Purchase

Installed on 67 Camaro 327 with cam, intake, 4bbl. In combination with a new 2.5 inch exhaust the headers really completed the performance upgrade I was seeking. The engine starts and runs much better and low end performance is a drastic improvement. The engine seemed to be running rich before the headers and now it runs beautifully. The headers also fit easily even with air conditioning. ...read more

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Reviewer: JEFFREY from CA

Date: July 29, 2014

Appearance
Ease of Installation
Price/Value
Quality

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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