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Doug Thorley Tri-Y Headers 375Y-C

Get Free Shipping with Your Order over $99!

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

Estimated Ship Date: Today Would you rather pick it up? Select Location

  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight fees. Valid on orders shipped in the contiguous United States.

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Brand: Doug Thorley Headers

Manufacturer's Part Number: 375Y-C

Part Type: Headers

Product Line: Doug Thorley Tri-Y Headers

Summit Racing Part Number: DTE-375Y-C

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.

Results 1 - 20 of 155

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Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1965

Ending Year: 1967

Engine Type: V8

Liter: 4.6

CID: 283

CC: 4638

Engine Size: 4.6L/283

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1965

Ending Year: 1969

Engine Type: V8

Liter: 5.3

CID: 327

CC: 5358

Engine Size: 5.3L/327

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1968

Ending Year: 1968

Engine Type: V8

Liter: 5.0

CID: 307

CC: 5031

Engine Size: 5.0L/307

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1969

Ending Year: 1974

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5736

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1970

Ending Year: 1974

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6555

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1970

Ending Year: 1974

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6556

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BEL AIR

Submodel: BASE

Beginning Year: 1972

Ending Year: 1974

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5737

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1965

Ending Year: 1967

Engine Type: V8

Liter: 4.6

CID: 283

CC: 4638

Engine Size: 4.6L/283

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1965

Ending Year: 1969

Engine Type: V8

Liter: 5.3

CID: 327

CC: 5358

Engine Size: 5.3L/327

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1968

Ending Year: 1968

Engine Type: V8

Liter: 5.0

CID: 307

CC: 5031

Engine Size: 5.0L/307

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1969

Ending Year: 1972

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5736

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1970

Ending Year: 1972

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6555

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1970

Ending Year: 1972

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6556

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BISCAYNE

Submodel: BASE

Beginning Year: 1972

Ending Year: 1972

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5737

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1969

Ending Year: 1969

Engine Type: V8

Liter: 5.3

CID: 327

CC: 5358

Engine Size: 5.3L/327

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1969

Ending Year: 1972

Engine Type: V8

Liter: 5.0

CID: 307

CC: 5031

Engine Size: 5.0L/307

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1969

Ending Year: 1972

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5736

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1970

Ending Year: 1970

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6556

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1970

Ending Year: 1972

Engine Type: V8

Liter: 6.6

CID: 400

CC: 6555

Engine Size: 6.6L/400

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

Make: CHEVROLET

Model: BROOKWOOD

Submodel: BASE

Beginning Year: 1972

Ending Year: 1972

Engine Type: V8

Liter: 5.7

CID: 350

CC: 5737

Engine Size: 5.7L/350

Engine Family: Chevy small block Gen I

Drivetrain: RWD

Engine Swap: No

Power Steering: No

Power Brakes (application): Yes

Air Conditioning: Yes

Standard Transmission Column Shift: Yes

Standard Transmission Floor Shift: Yes

Automatic Transmission Column Shift: Yes

Automatic Transmission Floor Shift: Yes

Footnotes: 2 - Will fit with angle plug heads.
6 - Does not fit Power Glide transmissions.
11 - Fits column shift models only.

7 Results Found

Stage 8 Locking Fasteners 8911A - Stage 8 Locking Header Bolt Kits

Click here for more information about Stage 8 Locking Fasteners 8911A - Stage 8 Locking Header Bolt Kits

Header Fasteners, Bolts, Locking, Double Hex Head, Steel, Nickel Plated, Chevy, V6, Small Block V8, Set of 12

Part Number: STG-8911A

Estimated Ship Date: Today

$59.89

Summit Racing SUM-610125 - Summit Racing® Copper Collector Gaskets

Click here for more information about Summit Racing SUM-610125 - Summit Racing® Copper Collector Gaskets

Collector Gaskets, Copper, 3-Hole, 2.5 in. Inside Diameter, Pair

Part Number: SUM-610125

Estimated Ship Date: Today

$14.97

Mr. Gasket 5902 - Mr. Gasket Ultra-Seal Exhaust Gaskets

Click here for more information about Mr. Gasket 5902 - Mr. Gasket Ultra-Seal Exhaust Gaskets

Exhaust Gaskets, Header, Ultra-Seal, Round Port, Chevy, Small Block, Pair

Part Number: MRG-5902

Estimated Ship Date: Today

$19.97

SCE Gaskets 4250 - SCE Pro Copper Collector Gaskets

Click here for more information about SCE Gaskets 4250 - SCE Pro Copper Collector Gaskets

Collector Gaskets, Copper, Embossed, 3-Hole, 2.5 in. Inside Diameter, Pair

Part Number: SCE-4250

Estimated Ship Date: Today

$13.60

Car Chemistry CGHP6 - Car Chemistry Cerma-Glow Metallic Ceramic Header Polish

Click here for more information about Car Chemistry CGHP6 - Car Chemistry Cerma-Glow Metallic Ceramic Header Polish

Cerma Glow, Metallic Ceramic Header Polish, 6oz, Each

Part Number: CCI-CGHP6

Estimated Ship Date: Today

$11.97

  • Restricted,

    Shipping restrictions may apply on this part.

  • Ground

    If you purchase this part, your order can only be shipped by ground.

Mr. Gasket 5916 - Mr. Gasket Ultra-Seal Exhaust Gaskets

Click here for more information about Mr. Gasket 5916 - Mr. Gasket Ultra-Seal Exhaust Gaskets

Exhaust Gaskets, Header, Ultra-Seal, Steel Core Laminate, Square Port, Chevy, Small Block, Pair

Part Number: MRG-5916

Estimated Ship Date: Today

$22.97

SCE Gaskets 211181 - SCE AccuSeal Pro Exhaust Gaskets

Click here for more information about SCE Gaskets 211181 - SCE AccuSeal Pro Exhaust Gaskets

Exhaust Gaskets, AccuSeal Pro, Chevy, Small Block, Pair

Part Number: SCE-211181

Estimated Ship Date: Today

$18.87

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