Tri-Y Headers for 78-88 GM G Body 265-400 SBC 1-5/8in Primary D370Y
Tri-Y Headers for 78-88 GM G Body 265-400 SBC 1-5/8in Primary D370Y is backordered and will ship as soon as it is back in stock.
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Fitment
Fitment
Warranty Information
Warranty Information
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Description
Description
Overview:
Header GM G Body SBC 78-87 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: Silver
- Cylinder Head Port Shape: Oval
- Design: Tri-Y
- EGT Port: No
- Finish: Metallic Ceramic Coated
- Flange Thickness: 0.375 IN
- Gasket Or Seal Included: Yes
- Gaskets Included: Yes
- Grade Type: Performance
- Header Material: Steel
- Header Style: Tri-Y
- Material: Steel
- Mounting Hardware Included: Yes
- Oxygen Sensor Port: No
- Port Shape: Oval
- Primary Tube Outside Diameter: 1.625 IN
- Primary Tubing Diameter: 1.625 IN
- Prop 65 (C, R or CR): CR
- Prop 65 Yes/No: Yes
- Sheen Level: Semi-Gloss
- Title: Doug's Tri Y Header 78-88 GM G Body 265-400 SBC 1 5/8-2" Primary 2 1/2" Collector Silver Ceramic Coated D370Y
- Tube Wall Thickness: 16 GU
- Part Number: D370Y
Applications:
- 1978-1987 Chevrolet El Camino 305 CID
- 1978-1984 Chevrolet El Camino 350 CID
- 1979-1982 Chevrolet El Camino 267 CID
- 1978-1983 Chevrolet Malibu 305 CID
- 1978-1983 Chevrolet Malibu 350 CID
- 1979-1982 Chevrolet Malibu 267 CID
- 1978-1988 Chevrolet Monte Carlo 305 CID
- 1979-1982 Chevrolet Monte Carlo 267 CID
- 1982-1984 Chevrolet Monte Carlo 350 CID
- 1978-1980 Oldsmobile Cutlass 305 CID
- 1978-1979 Oldsmobile Cutlass 350 CID
- 1983-1986 Pontiac Bonneville 305 CID
- 1978-1987 Pontiac Grand Prix 305 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:
- Fits most angle plug heads.
- Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 and ZZ6 engines.
- Requires removal or modification of locking steering columns if equipped.
- Installation requires left side A/C bracket part number H7608. 1979 and later vehicles with short compressors can use the stock bracket.
- Fits Factory Installed Chevrolet 265-350 small block engines. Does not fit with power glide transmission.
Payment & Security
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