Which vehicles does the Doug's Headers D521-B fit?

Fits 1965 to 1968 Pontiac Bonneville, Catalina, Grand Prix. Fits D-Port heads Only.; Some factory heads do not have end bolt holes and should be drilled and tapped to assure proper sealing.; Full-length; Hi-Temp Black Coating

How much is shipping and when does it ship?

It ships Oct 22. Ground shipping in Canada is free on orders of $100 and up, $9.99 under that.

Doug's Headers Long Tube Header 65-70 Pontiac 326-455 1 3/4" Primary 3" Collector Black Hi Temp Coated

Mfg Part #: D521-B
SKU: DOUD521-B
Brand
Fitment Note: Fits D-Port heads Only.; Some factory heads do not have end bolt holes and should be drilled and tapped to assure proper sealing.; Full-length; Hi-Temp Black Coating

Fits 1965 to 1968 Pontiac Bonneville, Catalina, Grand Prix. See every vehicle

3/8" Thick machined flanges to prevent warping
Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
Heavy duty 16-gauge tubing for long life
Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating

$1,424.99 CAD Ships Oct 22

Free shipping in Canada, ships Oct 22

Availability:

Does this fit your vehicle?

Description

Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.

Collector Attachment	3-Bolt Flange
Collector Diameter	3.0 in
Collector Port Diameter	3.0 in
Color	Black
Cylinder Head Port Shape	D-port
Design	Full-length
EGT Port	No
EmissionFullDES	4 - This Product is considered a Replacement Part per CARB and EPA regulations for emissions compliance and is legal for sale and use on specified vehicles in all 50 states as stated in Manufacturer’s Application Guide and Installation Instructions.
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	D-port
Primary Tube Outside Diameter	1.75 in
Primary Tubing Diameter	1.75 in
Sheen Level	Matte
Tube Wall Thickness	16 ga.
Brand	Doug's Headers
Mfg part #	D521-B

Fits these vehicles

Year	Make	Model	Engine
1965 - 1966	Pontiac	Bonneville	6.4L 389 V8, 6.9L 421 V8
1967 - 1968	Pontiac	Bonneville	6.6L 400 V8, 7.0L 428 V8
1965 - 1966	Pontiac	Catalina	6.4L 389 V8, 6.9L 421 V8
1967 - 1968	Pontiac	Catalina	6.6L 400 V8, 7.0L 428 V8
1965 - 1966	Pontiac	Grand Prix	6.4L 389 V8, 6.9L 421 V8
1967 - 1968	Pontiac	Grand Prix	6.6L 400 V8, 7.0L 428 V8