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Doug's Headers | SKU:
D303Y-B-BKLK
Tri-Y Headers for 68-91 GM Truck 396-502 BBC 1-3/4in Primary D303Y-B
Regular price
$781.40 USD
Unit price
/
Unavailable
Shipping calculated at checkout.
Tri-Y Headers for 68-91 GM Truck 396-502 BBC 1-3/4in Primary D303Y-B is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Fitment
Fitment
Warranty Information
Warranty Information
Customer service is our top priority and because we value your time and energy we ask you to visit our Contact Us page and reach out so that we may assist you in finding the correct warranty for your product. Please include your name, the name on the order, the order number, and the SKU of the product to ensure the quickest and most accurate response to your inquiry.
Description
Description
Overview:
68-91 GM Truck BBC Tri Y Black Ctd
Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.
Features:
- 3/8" thick machined flanges to prevent warping
- CNC mandrel bent tubes ensure accurate fit and better flow
- Heavy 16-guage tubing for longer life
- Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
Specs:
- Brand: Doug's Headers
- Collector Attachment: 3-Bolt Flange
- Collector Diameter: 2.5 IN
- Collector Port Diameter: 2.5 IN
- Color: Black
- Cylinder Head Port Shape: SAP
- Design: Full-length
- EGT Port: No
- Finish: Hi-Temp Black Coating
- Flange Thickness: 0.375 IN
- Gasket Or Seal Included: Yes
- Gaskets Included: Yes
- Grade Type: Performance
- Header Material: Steel
- Header Style: Full-length
- Material: Steel
- Mounting Hardware Included: Yes
- Oxygen Sensor Port: No
- Port Shape: Round
- Primary Tube Outside Diameter: 1.75 IN
- Primary Tubing Diameter: 1.75 IN
- Prop 65 (C, R or CR): CR
- Prop 65 Yes/No: Yes
- Sheen Level: Matte
- Title: Doug's Tri Y Header 68-91 GM Truck 396-502 BBC 1 3/4-2" Primary 2 1/2" Collector Black Hi Temp Coated D303Y-B
- Tube Wall Thickness: 16 GU
- Part Number: D303Y-B
Applications:
- 1968-1969 Chevrolet C10 Pickup 396 CID
- 1970-1972 Chevrolet C10 Pickup 402 CID
- 1973-1974 Chevrolet C10 Pickup 454 CID
- 1968-1969 Chevrolet C20 Pickup 396 CID
- 1970-1972 Chevrolet C20 Pickup 402 CID
- 1973-1974 Chevrolet C20 Pickup 454 CID
- 1968-1969 Chevrolet C30 Pickup 396 CID
- 1970-1972 Chevrolet C30 Pickup 402 CID
- 1973-1974 Chevrolet C30 Pickup 454 CID
- 1968-1969 Chevrolet K10 Pickup 396 CID
- 1970-1972 Chevrolet K10 Pickup 402 CID
- 1973-1974 Chevrolet K10 Pickup 454 CID
- 1968-1969 Chevrolet K20 Pickup 396 CID
- 1970-1972 Chevrolet K20 Pickup 402 CID
- 1973-1974 Chevrolet K20 Pickup 454 CID
- 1968-1969 Chevrolet K30 Pickup 396 CID
- 1970-1972 Chevrolet K30 Pickup 402 CID
- 1973-1974 Chevrolet K30 Pickup 454 CID
- 1973-1974 Chevrolet Blazer 454 CID
- 1976-1978 Chevrolet K5 Blazer 454 CID
- 1975-1980 Chevrolet C10 454 CID
- 1968-1969 Chevrolet C10 Suburban 396 CID
- 1970-1972 Chevrolet C10 Suburban 402 CID
- 1973-1980 Chevrolet C10 Suburban 454 CID
- 1975-1987 Chevrolet C20 454 CID
- 1968-1969 Chevrolet C20 Suburban 396 CID
- 1970-1972 Chevrolet C20 Suburban 402 CID
- 1973-1986 Chevrolet C20 Suburban 454 CID
- 1975-1986 Chevrolet C30 454 CID
- 1988-1991 Chevrolet C3500 454 CID
- 1976-1980 Chevrolet K10 454 CID
- 1968-1969 Chevrolet K10 Suburban 396 CID
- 1970-1972 Chevrolet K10 Suburban 402 CID
- 1973-1974 Chevrolet K10 Suburban 454 CID
- 1976-1978 Chevrolet K20 454 CID
- 1968-1969 Chevrolet K20 Suburban 396 CID
- 1970-1972 Chevrolet K20 Suburban 402 CID
- 1973-1985 Chevrolet K20 Suburban 454 CID
- 1977-1986 Chevrolet K30 454 CID
- 1988-1991 Chevrolet K3500 454 CID
- 1987-1988 Chevrolet R20 454 CID
- 1987-1988 Chevrolet R20 Suburban 454 CID
- 1989-1989 Chevrolet R2500 454 CID
- 1989-1991 Chevrolet R2500 Suburban 454 CID
- 1987-1988 Chevrolet R30 454 CID
- 1989-1991 Chevrolet R3500 454 CID
- 1987-1988 Chevrolet V20 Suburban 454 CID
- 1990-1990 Chevrolet V2500 Suburban 454 CID
- 1987-1988 Chevrolet V30 454 CID
- 1989-1991 Chevrolet V3500 454 CID
- 1968-1969 GMC C15/C1500 Pickup 396 CID
- 1970-1972 GMC C15/C1500 Pickup 402 CID
- 1973-1974 GMC C15/C1500 Pickup 454 CID
- 1968-1969 GMC C15/C1500 Suburban 396 CID
- 1970-1972 GMC C15/C1500 Suburban 402 CID
- 1973-1974 GMC C15/C1500 Suburban 454 CID
- 1968-1969 GMC C25/C2500 Pickup 396 CID
- 1970-1972 GMC C25/C2500 Pickup 402 CID
- 1973-1974 GMC C25/C2500 Pickup 454 CID
- 1968-1969 GMC C25/C2500 Suburban 396 CID
- 1970-1972 GMC C25/C2500 Suburban 402 CID
- 1973-1974 GMC C25/C2500 Suburban 454 CID
- 1968-1969 GMC C35/C3500 Pickup 396 CID
- 1970-1972 GMC C35/C3500 Pickup 402 CID
- 1973-1974 GMC C35/C3500 Pickup 454 CID
- 1968-1969 GMC K15/K1500 Pickup 396 CID
- 1970-1972 GMC K15/K1500 Pickup 402 CID
- 1973-1974 GMC K15/K1500 Pickup 454 CID
- 1968-1969 GMC K15/K1500 Suburban 396 CID
- 1970-1972 GMC K15/K1500 Suburban 402 CID
- 1973-1974 GMC K15/K1500 Suburban 454 CID
- 1968-1969 GMC K25/K2500 Pickup 396 CID
- 1970-1972 GMC K25/K2500 Pickup 402 CID
- 1973-1974 GMC K25/K2500 Pickup 454 CID
- 1968-1969 GMC K25/K2500 Suburban 396 CID
- 1970-1972 GMC K25/K2500 Suburban 402 CID
- 1973-1974 GMC K25/K2500 Suburban 454 CID
- 1968-1969 GMC K35/K3500 Pickup 396 CID
- 1970-1972 GMC K35/K3500 Pickup 402 CID
- 1979-1980 GMC C1500 454 CID
- 1979-1980 GMC C1500 Suburban 454 CID
- 1979-1986 GMC C2500 454 CID
- 1979-1986 GMC C2500 Suburban 454 CID
- 1979-1986 GMC C3500 454 CID
- 1980-1980 GMC K1500 454 CID
- 1979-1986 GMC K3500 454 CID
- 1987-1989 GMC R2500 454 CID
- 1987-1991 GMC R2500 Suburban 454 CID
- 1987-1991 GMC R3500 454 CID
- 1987-1991 GMC V3500 454 CID
- 1975-1978 GMC C15 454 CID
- 1975-1978 GMC C15 Suburban 454 CID
- 1975-1978 GMC C25 454 CID
- 1975-1978 GMC C25 Suburban 454 CID
- 1975-1978 GMC C35 454 CID
- 1973-1976 GMC Jimmy 454 CID
- 1976-1976 GMC K15 454 CID
- 1976-1978 GMC K25 454 CID
- 1976-1977 GMC K25 Suburban 454 CID
Emissions:
- This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.
Instructions:
Fitment Notes:
- Big block frame stands and motor mounts required for proper fit.
- with Air Conditioning
- Does not fit 4 speed applications with Factory Side bell housing mounts.
- without Catalytic Converter
Payment & Security
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