Menu
800-227-2242
My Garage Add a vehicle

Recent vehicles

Vehicles you shop for show up here. Pick one in the Shop By Vehicle bar below.

Cart
Reset
Tri Y Header 68-91 GM Truck 396-502 BBC 1 3/4-2" Primary 2 1/2" Collector Black Hi Temp Coated

Doug's Headers Tri Y Header 68-91 GM Truck 396-502 BBC 1 3/4-2" Primary 2 1/2" Collector Black Hi Temp Coated

Mfg Part #
D303Y-B
NP#
DOUD303Y-B
Brand
Doug's Headers

Fits 1968 to 1991 Chevrolet Blazer, C10, C10 Pickup and 27 more models, and 1 more make. See every vehicle

  • 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
$1,125.99 CAD Free shipping in Canada, ships Friday, October 2
Free shipping in Canada, ships Friday, October 2Free shipping in Canada
Availability: This item is available at the manufacturer.
Book installation at our Service Centre

Does this fit your vehicle?

Description

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.

Fits these vehicles

YearMakeModelBody StyleEngine
1973 - 1974ChevroletBlazer-7.4L 454 V8
1975 - 1980ChevroletC10-7.4L 454 V8
1968 - 1969ChevroletC10 Pickup-6.5L 396 V8
1970 - 1972ChevroletC10 Pickup-6.6L 402 V8
1973 - 1974ChevroletC10 Pickup-7.4L 454 V8
1968 - 1969ChevroletC10 Suburban-6.5L 396 V8
1970 - 1972ChevroletC10 Suburban-6.6L 402 V8
1973 - 1980ChevroletC10 Suburban-7.4L 454 V8
1975 - 1986ChevroletC20-7.4L 454 V8
1968 - 1969ChevroletC20 Pickup-6.5L 396 V8
1970 - 1972ChevroletC20 Pickup-6.6L 402 V8
1973 - 1974ChevroletC20 Pickup-7.4L 454 V8
1968 - 1969ChevroletC20 Suburban-6.5L 396 V8
1970 - 1972ChevroletC20 Suburban-6.6L 402 V8
1973 - 1986ChevroletC20 Suburban-7.4L 454 V8
1975 - 1986ChevroletC30-7.4L 454 V8
1968 - 1969ChevroletC30 Pickup-6.5L 396 V8
1970 - 1972ChevroletC30 Pickup-6.6L 402 V8
1973 - 1974ChevroletC30 Pickup-7.4L 454 V8
1988 - 1991ChevroletC3500-7.4L 454 V8
1976ChevroletK10-7.4L 454 V8
1980ChevroletK10-7.4L 454 V8
1968 - 1969ChevroletK10 Pickup-6.5L 396 V8
1970 - 1972ChevroletK10 Pickup-6.6L 402 V8
1973 - 1974ChevroletK10 Pickup-7.4L 454 V8
1968 - 1969ChevroletK10 Suburban-6.5L 396 V8
1970 - 1972ChevroletK10 Suburban-6.6L 402 V8
1973 - 1974ChevroletK10 Suburban-7.4L 454 V8
1976 - 1978ChevroletK20-7.4L 454 V8
1968 - 1969ChevroletK20 Pickup-6.5L 396 V8
1970 - 1972ChevroletK20 Pickup-6.6L 402 V8
1973 - 1974ChevroletK20 Pickup-7.4L 454 V8
1968 - 1969ChevroletK20 Suburban-6.5L 396 V8
1970 - 1972ChevroletK20 Suburban-6.6L 402 V8
1973 - 1974ChevroletK20 Suburban-7.4L 454 V8
1985ChevroletK20 Suburban-7.4L 454 V8
1977ChevroletK30-7.4L 454 V8
1980 - 1986ChevroletK30-7.4L 454 V8
1968 - 1969ChevroletK30 Pickup-6.5L 396 V8
1970 - 1972ChevroletK30 Pickup-6.6L 402 V8
1973 - 1974ChevroletK30 Pickup-7.4L 454 V8
1988 - 1991ChevroletK3500Standard Cab Pickup7.4L 454 V8
1976 - 1978ChevroletK5 Blazer-7.4L 454 V8
1987 - 1988ChevroletR20-7.4L 454 V8
1987 - 1988ChevroletR20 Suburban-7.4L 454 V8
1989ChevroletR2500-7.4L 454 V8
1989 - 1991ChevroletR2500 Suburban-7.4L 454 V8
1987 - 1988ChevroletR30-7.4L 454 V8
1989 - 1990ChevroletR3500Crew Cab Pickup7.4L 454 V8
1989ChevroletR3500Standard Cab Pickup7.4L 454 V8
1987 - 1988ChevroletV20 Suburban-7.4L 454 V8
1990ChevroletV2500 Suburban-7.4L 454 V8
1987 - 1988ChevroletV30Crew Cab Pickup7.4L 454 V8
1987 - 1988ChevroletV30Standard Cab Pickup7.4L 454 V8
1989 - 1991ChevroletV3500Crew Cab Pickup7.4L 454 V8
1989ChevroletV3500Standard Cab Pickup7.4L 454 V8
1975 - 1978GMCC15-7.4L 454 V8
1979 - 1980GMCC1500-7.4L 454 V8
1979 - 1980GMCC1500 Suburban-7.4L 454 V8
1968 - 1969GMCC15/C1500 Pickup-6.5L 396 V8
1970 - 1972GMCC15/C1500 Pickup-6.6L 402 V8
1973 - 1974GMCC15/C1500 Pickup-7.4L 454 V8
1968 - 1969GMCC15/C1500 Suburban-6.5L 396 V8
1970 - 1972GMCC15/C1500 Suburban-6.6L 402 V8
1973 - 1974GMCC15/C1500 Suburban-7.4L 454 V8
1975 - 1978GMCC15 Suburban-7.4L 454 V8
1975 - 1978GMCC25-7.4L 454 V8
1979 - 1986GMCC2500-7.4L 454 V8
1979 - 1986GMCC2500 Suburban-7.4L 454 V8
1968 - 1969GMCC25/C2500 Pickup-6.5L 396 V8
1970 - 1972GMCC25/C2500 Pickup-6.6L 402 V8
1973 - 1974GMCC25/C2500 Pickup-7.4L 454 V8
1968 - 1969GMCC25/C2500 Suburban-6.5L 396 V8
1970 - 1972GMCC25/C2500 Suburban-6.6L 402 V8
1973 - 1974GMCC25/C2500 Suburban-7.4L 454 V8
1975 - 1978GMCC25 Suburban-7.4L 454 V8
1975 - 1978GMCC35-7.4L 454 V8
1979 - 1986GMCC3500Crew Cab Pickup7.4L 454 V8
1979 - 1986GMCC3500Standard Cab Pickup7.4L 454 V8
1968 - 1969GMCC35/C3500 Pickup-6.5L 396 V8
1970 - 1972GMCC35/C3500 Pickup-6.6L 402 V8
1973 - 1974GMCC35/C3500 Pickup-7.4L 454 V8
1973 - 1974GMCJimmy-7.4L 454 V8
1976GMCJimmy-7.4L 454 V8
1976GMCK15-7.4L 454 V8
1980GMCK1500-7.4L 454 V8
1968 - 1969GMCK15/K1500 Pickup-6.5L 396 V8
1970 - 1972GMCK15/K1500 Pickup-6.6L 402 V8
1973 - 1974GMCK15/K1500 Pickup-7.4L 454 V8
1968 - 1969GMCK15/K1500 Suburban-6.5L 396 V8
1970 - 1972GMCK15/K1500 Suburban-6.6L 402 V8
1973 - 1974GMCK15/K1500 Suburban-7.4L 454 V8
1976 - 1978GMCK25-7.4L 454 V8
1968 - 1969GMCK25/K2500 Pickup-6.5L 396 V8
1970 - 1972GMCK25/K2500 Pickup-6.6L 402 V8
1973 - 1974GMCK25/K2500 Pickup-7.4L 454 V8
1968 - 1969GMCK25/K2500 Suburban-6.5L 396 V8
1970 - 1972GMCK25/K2500 Suburban-6.6L 402 V8
1973 - 1974GMCK25/K2500 Suburban-7.4L 454 V8
1976 - 1977GMCK25 Suburban-7.4L 454 V8
1979 - 1986GMCK3500Crew Cab Pickup7.4L 454 V8
1979 - 1986GMCK3500Standard Cab Pickup7.4L 454 V8
1968 - 1969GMCK35/K3500 Pickup-6.5L 396 V8
1970 - 1972GMCK35/K3500 Pickup-6.6L 402 V8
1987 - 1989GMCR2500Crew Cab Pickup7.4L 454 V8
1987 - 1991GMCR2500 Suburban-7.4L 454 V8
1987 - 1991GMCR3500Crew Cab Pickup7.4L 454 V8
1987 - 1989GMCR3500Standard Cab Pickup7.4L 454 V8
1987 - 1991GMCV3500Crew Cab Pickup7.4L 454 V8

Sign up for sales, arrivals, vehicle specific content and more.