Home / Shop / Hooker Competition Manifold Back Exhaust Systems 16621HKR System, Manifold-Back, Steel, Aluminized, Chevy, GMC, RWD Small Block

Hooker Competition Manifold Back Exhaust Systems 16621HKR System, Manifold-Back, Steel, Aluminized, Chevy, GMC, RWD Small Block

SKU: HOK16621HKR

Exhaust Systems

Hooker Headers

Hooker Competition Manifold Back Exhaust Systems 16621HKR System, Manifold-Back, Steel, Aluminized, Chevy, GMC, RWD Small Block

SKU: HOK16621HKR

Exhaust Systems

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

IMPORTANT NOTICE: Must use 2 1/4 in. offset inlet/center outlet muffler. Long wheel base models only. Will not fit stock exhaust manifolds that exit straight down. Wheelbase greater than 132 inch will require tailpipe extensions to provide proper tailpipe exit.

Hooker manifold-back Competition exhaust systems feature large-diameter, 16-gauge steel tubing for improved efficiency, less backpressure, and longer life. Each system is mandrel-bent to maintain a consistent inside diameter for maximum flow. All systems come without mufflers.

Part Type

Exhaust Systems

Data: v4.2 - Upd: 2026-09-29 03:34:49

Specifications

Product Attributes - Brand: Hooker Headers
Product Attributes - Manufacturer's Part Number: 16621HKR
Product Attributes - Part Type: Exhaust Systems
Product Attributes - Product Line: Hooker Competition Manifold Back Exhaust Systems
Product Attributes - UPC: 700414023892
Product Attributes - System Material: Steel
Product Attributes - System Style: Manifold-back
Product Attributes - Exhaust Type: Dual
Product Attributes - Exit Location: Split side
Product Attributes - System Finish: Aluminized
Product Attributes - Catalytic Converter(s) Included: No
Product Attributes - Intermediate Pipe Diameter (in.): 2.25 in.
Product Attributes - Muffler Included: No
Product Attributes - Hardware Included: Yes
Product Attributes - Tailpipe Diameter (in.): 2.25 in.
Product Attributes - Tip Included: No
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Must use 2 1/4 in. offset inlet/center outlet muffler. Long wheel base models only. Will not fit stock exhaust manifolds that exit straight down. Wheelbase greater than 132 inch will require tailpipe extensions to provide proper tailpipe exit.
Product Attributes - Special Attention: It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.

Reference Information

Brand Name/s	Hooker Headers
StreetFX SKU	hok16621HKR
SFX Item ID	5013474
Supplier Item Code	5013474
Manufacturer SKU	16621HKR
Manufacturer UPC	700414023892
Alternative References	HKR16621HKR

Compatibility

Application Data

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Manual
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Automatic
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Manual
Drivetrain	4WD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Crew Cab Pickup
Transmission	Automatic
Drivetrain	4WD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	4WD
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1969
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	4WD
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	F

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1969
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	4WD
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	H

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	RWD
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	J

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	4.6L/283
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	RWD
Liter	5.7
CID	350
CC	4638
Application Notes	U/K, U/K; Sport Utility; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

Universal	No
Make	GMC
Model	C30 PICKUP
Submodel	BASE
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	5.3L/327
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	RWD
Liter	5.7
CID	350
CC	5358
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C30 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1970
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Crew Cab Pickup
Transmission	Manual
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; Sport Utility; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	4.6L/283
Engine Family	Chevy small block Gen I
Body Style	Crew Cab Pickup
Transmission	Automatic
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	4.6
CID	283
CC	4638
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	H

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	5.3L/327
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Manual
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.3
CID	327
CC	5358
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	P

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1969
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Automatic
Drivetrain	4WD
Truck Bed Length in. (AAIA)	96.0
Liter	5.0
CID	307
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	H
CC	5031

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1972
Ending Year	1969
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	RWD
Liter	5.0
CID	307
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	U
CC	5031

Universal	No
Make	GMC
Model	C30 PICKUP
Submodel	BASE
Beginning Year	1972
Ending Year	1971
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	RWD
Liter	5.0
CID	307
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	J
CC	5031

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1967
Ending Year	1967
Engine Type	V8
Engine Size	4.6L/283
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	4WD
Liter	4.6
CID	283
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	A
CC	4638

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1967
Ending Year	1967
Engine Type	V8
Engine Size	4.6L/283
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	RWD
Liter	4.6
CID	283
Application Notes	U/K, U/K; Sport Utility; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B
CC	4638

Universal	No
Make	GMC
Model	C15/C1500 PICKUP
Submodel	BASE
Beginning Year	1967
Ending Year	1967
Engine Type	V8
Engine Size	5.3L/327
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	4WD
Liter	5.3
CID	327
CC	5358
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	H

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	5.3L/327
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Automatic
Drivetrain	4WD
Liter	5.3
CID	327
CC	5358
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	E

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1968
Ending Year	1968
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Manual
Drivetrain	4WD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1968
Engine Type	V8
Engine Size	5.7L/350
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Automatic
Drivetrain	4WD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	Dual Competition Manifold Back Exhaust System Kit; 2.25 in. Tubing; Uses Any 2.25 in. Offset Inlet/Center Outlet Muffler; Incl. Extension Pipes/Overaxle Pipes/Tailpipes/Hardware;Intended For Race Use Only
Region	USA
Engine VIN Code	E

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1971
Ending Year	1971
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Manual
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; Sport Utility; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Standard Cab Pickup
Transmission	Automatic
Drivetrain	RWD
Truck Bed Length in. (AAIA)	96.0
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	A

Universal	No
Make	GMC
Model	C15/C1500 SUBURBAN
Submodel	BASE
Beginning Year	1970
Ending Year	1970
Engine Type	V8
Engine Size	5.0L/307
Engine Family	Chevy small block Gen I
Body Style	Sport Utility
Truck Bed Length in. (AAIA)	96.0
Transmission	Manual
Drivetrain	RWD
Liter	5.7
CID	350
CC	5031
Application Notes	U/K, U/K; U/K; RWD; Dual Competition Manifold Back Exhaust System Kit;
Region	USA
Engine VIN Code	B

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Hooker Competition Manifold Back Exhaust Systems 16621HKR System, Manifold-Back, Steel, Aluminized, Chevy, GMC, RWD Small Block

Hooker Competition Manifold Back Exhaust Systems 16621HKR System, Manifold-Back, Steel, Aluminized, Chevy, GMC, RWD Small Block

Description

Part Type

Specifications

Reference Information

Compatibility

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