FlowTech Long Tube Header, Black Paint 11500FLT

Name: FlowTech Long Tube Header, Black Paint 11500FLT
Brand: FlowTech
SKU: 4005899
Price: 396.99 CAD
Availability: InStock

$396.99 ea

NEWARRIVING SOONEstimated Ship Date 09/14/2026 (If Ordered Today)99 Available from HOLLEY PERFORMANCE PRODUCTS as of 08/30/2026

Model: 4005899

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Description Vehicle Fitment Downloads Specifications Reviews (0) Product Q&A Related Products

Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat resistant black paint for a stealthy appearance.

Features:

Fuel Economy From The Engine
Leak Test For Max Performance
Mandrel-Formed Power Plenum
Leakproof O-Ringed Port Seals
Include All Mounting Hardware
Construced of .049 cold roll flash mild steel tubing
Precision engineered for fit, performance and economy
Works with factory power steering and power brakes

Requires Flowtech air conditioning bracket 10042FLT. May require clutch linkage modification. Does not fit with angle plug heads. Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Please call Flowtech tech service at 270-781-9741 for additional information regarding ceramic coated exhaust products. The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Flowtech does not recommend the use of header wraps as this will void the warranty.

Installation Notes:

About FlowTech

Flowtech Performance Exhaust was founded in 1994, by exhaust market expert Gary Biggs, with the mission of delivering high quality performance exhaust at a great value. The mission was successful and in less than two decades Flowtech became the leader in value priced exhaust systems.

Flowtech cornered its place in the market with aggressive and memorable product names such as Raptor™, Terminator™, Afterburner™ and Warlock™. Flowtech even revived some names from back in the day like Purple Hornies™.

Flowtech made its mark with simple yet effective improvements like slotted port flanges giving added wiggle room during header installation. They dimpled their tubes at the port to make more room for the header bolts and they parallel ground their flanges to assure a tight seal. Flowtech innovations include their unique Afterburner headers which separated the odd firing cylinders with a velocity tube to improve scavenging. Their patented Warlock bypass muffler won the SEMA best new product award for its revolutionary open or closed design in 1996.

When Flowtech became part of Holley Performance Products in 1999, the company continued to focus on value, with an emphasis on late model cars and trucks. Headers and exhaust systems were developed for Mustangs, Camaros, and all types of full size trucks - including diesels. The same innovation continues today with the addition of universal X-pipe kits and X-pipe kits with built in cut-outs. Continuous product updates and improvements to manufacturing processes will keep Flowtech the leader in value priced exhaust systems. We hope you enjoy your Flowtech product as much as we enjoy building it!

Downloads:

Download Name	File Size
11500-3901fltrev1.pdf	170.7KB

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.

Make	Model	Submodel	Years	Engine
Chevrolet	Blazer	Base	1969	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	Blazer	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	Blazer	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	Blazer	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	Blazer	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	Blazer	Base	1974	5.7L / 350 / V8
Chevrolet	C10 Pickup	Base	1966	5.3L / 327 / V8 4.6L / 283 / V8
Chevrolet	C10 Pickup	Base	1967	5.3L / 327 / V8 4.6L / 283 / V8
Chevrolet	C10 Pickup	Base	1968	5.3L / 327 / V8 6.5L / 396 / V8 5.0L / 307 / V8 5.4L / 327 / V8
Chevrolet	C10 Pickup	Base	1969	5.3L / 327 / V8 5.7L / 350 / V8 6.5L / 396 / V8 5.0L / 307 / V8
Chevrolet	C10 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C10 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C10 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C10 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C10 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	C10 Suburban	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	C10 Suburban	Base	1974	5.7L / 350 / V8
Chevrolet	C20 Pickup	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	C20 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	C20 Pickup	Base	1968	5.3L / 327 / V8 6.5L / 396 / V8 5.0L / 307 / V8 5.4L / 327 / V8
Chevrolet	C20 Pickup	Base	1969	5.3L / 327 / V8 6.5L / 396 / V8 5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	C20 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C20 Suburban	Base	1974	5.7L / 350 / V8
Chevrolet	C30 Pickup	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	C30 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	C30 Pickup	Base	1968	5.4L / 327 / V8 6.5L / 396 / V8 5.0L / 307 / V8 5.3L / 327 / V8
Chevrolet	C30 Pickup	Base	1969	6.5L / 396 / V8 5.7L / 350 / V8 5.0L / 307 / V8 5.3L / 327 / V8
Chevrolet	C30 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C30 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C30 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C30 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	C30 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	K10 Pickup	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	K10 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	K10 Pickup	Base	1968	5.3L / 327 / V8 5.0L / 307 / V8 5.4L / 327 / V8 6.5L / 396 / V8
Chevrolet	K10 Pickup	Base	1969	5.7L / 350 / V8 5.3L / 327 / V8 5.0L / 307 / V8 6.5L / 396 / V8
Chevrolet	K10 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K10 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K10 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K10 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K10 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	K10 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K10 Suburban	Base	1974	5.7L / 350 / V8
Chevrolet	K20 Pickup	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	K20 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
Chevrolet	K20 Pickup	Base	1968	6.5L / 396 / V8 5.3L / 327 / V8 5.0L / 307 / V8 5.4L / 327 / V8
Chevrolet	K20 Pickup	Base	1969	6.5L / 396 / V8 5.7L / 350 / V8 5.3L / 327 / V8 5.0L / 307 / V8
Chevrolet	K20 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K20 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K20 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K20 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K20 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	K20 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
Chevrolet	K20 Suburban	Base	1974	5.7L / 350 / V8
Chevrolet	K30 Pickup	Base	1968	6.5L / 396 / V8 5.0L / 307 / V8 5.4L / 327 / V8 5.3L / 327 / V8
Chevrolet	K30 Pickup	Base	1969	6.5L / 396 / V8 5.0L / 307 / V8 5.7L / 350 / V8 5.3L / 327 / V8
Chevrolet	K30 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	K30 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	K30 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	K30 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
Chevrolet	K30 Pickup	Base	1974	5.7L / 350 / V8
Chevrolet	Suburban	Base	1966	4.6L / 283 / V8 5.3L / 327 / V8
GMC	C15/C1500 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
GMC	C15/C1500 Pickup	Base	1968	6.5L / 396 / V8 5.4L / 327 / V8 5.3L / 327 / V8 5.0L / 307 / V8
GMC	C15/C1500 Pickup	Base	1969	6.5L / 396 / V8 5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Pickup	Base	1974	5.7L / 350 / V8
GMC	C15/C1500 Suburban	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C15/C1500 Suburban	Base	1974	5.7L / 350 / V8
GMC	C25/C2500 Pickup	Base	1967	5.3L / 327 / V8 4.6L / 283 / V8
GMC	C25/C2500 Pickup	Base	1968	5.4L / 327 / V8 6.5L / 396 / V8 5.3L / 327 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1969	6.5L / 396 / V8 5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Pickup	Base	1974	5.7L / 350 / V8
GMC	C25/C2500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	C25/C2500 Suburban	Base	1974	5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
GMC	C35/C3500 Pickup	Base	1968	6.5L / 396 / V8 5.0L / 307 / V8 5.4L / 327 / V8 5.3L / 327 / V8
GMC	C35/C3500 Pickup	Base	1969	6.5L / 396 / V8 5.0L / 307 / V8 5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
GMC	C35/C3500 Pickup	Base	1974	5.7L / 350 / V8
GMC	Jimmy	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
GMC	Jimmy	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
GMC	Jimmy	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
GMC	Jimmy	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	Jimmy	Base	1974	5.7L / 350 / V8
GMC	K15/K1500 Pickup	Base	1967	4.6L / 283 / V8 5.3L / 327 / V8
GMC	K15/K1500 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8 6.5L / 396 / V8 5.3L / 327 / V8
GMC	K15/K1500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8 6.5L / 396 / V8
GMC	K15/K1500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K15/K1500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K15/K1500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K15/K1500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K15/K1500 Pickup	Base	1974	5.7L / 350 / V8
GMC	K15/K1500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K15/K1500 Suburban	Base	1974	5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1967	5.3L / 327 / V8 4.6L / 283 / V8
GMC	K25/K2500 Pickup	Base	1968	5.4L / 327 / V8 6.5L / 396 / V8 5.3L / 327 / V8 5.0L / 307 / V8
GMC	K25/K2500 Pickup	Base	1969	6.5L / 396 / V8 5.0L / 307 / V8 5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1970	5.0L / 307 / V8 5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1971	5.0L / 307 / V8 5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1972	5.0L / 307 / V8 5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1973	5.0L / 307 / V8 5.7L / 350 / V8
GMC	K25/K2500 Pickup	Base	1974	5.7L / 350 / V8
GMC	K25/K2500 Suburban	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K25/K2500 Suburban	Base	1974	5.7L / 350 / V8
GMC	K35/K3500 Pickup	Base	1968	5.4L / 327 / V8 5.0L / 307 / V8 6.5L / 396 / V8 5.3L / 327 / V8
GMC	K35/K3500 Pickup	Base	1969	5.7L / 350 / V8 5.0L / 307 / V8 6.5L / 396 / V8
GMC	K35/K3500 Pickup	Base	1970	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K35/K3500 Pickup	Base	1971	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K35/K3500 Pickup	Base	1972	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K35/K3500 Pickup	Base	1973	5.7L / 350 / V8 5.0L / 307 / V8
GMC	K35/K3500 Pickup	Base	1974	5.7L / 350 / V8

Specifications:

Bolt Size	3/8-16 x 3/4, 3/8-16 x 3/4
CARB (California) Compliant	No
Collector Diameter	3.00 inch
Emission Code	4
Engine	Chevrolet Small Block Gen I
Header Finish	Black Paint
Header Flange Thickness (in)	5/16 inch
Header Style	Long Tube
Part Type	Exhaust Header
Primary Tube Dia.	1-1/2 inch
Product Type	Headers
Proposition 65	www.P65Warnings.ca.gov
Tube Material	Mild Steel

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