Which vehicles does the Doug's Headers D521-SS 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.; 304 Stainless Steel; Full-length

How much is shipping and when does it ship?

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

Can Northern Performance install it?

Yes. Buy it online and have us install it at our Service Centre. The Service Centre is at 1164 Walkers Line, Burlington, Ontario.

Doug's Headers Long Tube Header 65-70 Pontiac 326-455 1 3/4" Primary 3" Collector 304 Stainless

Mfg Part #: D521-SS
NP#: DOUD521-SS
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.; 304 Stainless Steel; Full-length

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

Natural stainless-steel finish offers superior resistance to rust and corrosion
3/8" thick 304 stainless machine flanges to prevent warping
CNC 304 stainless mandrel bent tubes for an accurate fit and improved flow
Precision formed long transition collectors and long tube design reduce backpressure and increase higher RPM horsepower

$1,399.99 CAD

Free shipping in Canada

Availability:

Contact [email protected] to check before you order.

Book installation at our Service Centre

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	Silver
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	304 Stainless Steel
Flange Thickness	0.375 in
Gasket Or Seal Included	Yes
Gaskets Included	Yes
Grade Type	Performance
Header Material	304 Stainless Steel
Header Style	Full-length
Material	304 Stainless 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	Satin
Tube Wall Thickness	16 ga.
Brand	Doug's Headers
Mfg part #	D521-SS

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

Doug's Headers Long Tube Header 65-70 Pontiac 326-455 1 3/4" Primary 3" Collector 304 Stainless

Does this fit your vehicle?

Description

Fits these vehicles

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