The Hooker 2451HKR exhaust header for the 1965-1985 Chevrolet Impala 4.4L / 4.6L / 5.0L / 5.3L / 5.4L / 5.7L / 6.6L and other vehicles is a long-tube header for the Chevy small block. It carries exhaust from each port to the collector.
- Part of the Hooker Competition header line, made from 16 gauge mild steel tubing
- Long transition collector, 3.000 in. across, designed to reduce back pressure and increase exhaust flow
- 5/16 in. machined flanges, a size that maintains header integrity yet stays pliable enough to seal each exhaust port
- Mandrel-bent 1.625 in. tubing keeps the metal strong and the tube diameter consistent through the bends
- Black finish of heat-cured, high-heat-resistant paint
- Tuned-length tubes intended for exhaust scavenging and velocity
A ticking noise that is loudest on a cold start, an exhaust smell or soot around a flange can mean the exhaust header is cracked or leaking. Before you replace it, rule out a failed gasket or loose bolts at the exhaust ports, since either one can leak in a similar way.
The 1967-1981 Chevrolet Camaro 5.7L and the 1966-1989 Chevrolet Caprice 4.4L / 4.6L / 5.0L / 5.3L / 5.4L / 5.7L / 6.6L both get a direct fit from this exhaust header, and it also fits many other Chevrolet, Buick, GMC, Oldsmobile and Pontiac models.
Specifications
Fit and size
- Engine: Chevy Small Block
- Primary tube diameter: 1.625 in. (1-5/8 in.)
- Collector diameter: 3.000 in.
- Port shape: same as port, can be matched
- Quantity per vehicle: 1
Build and materials
- Header style: long-tube, down swept
- Product line: Hooker Competition
- Material: 16 gauge mild steel
- Tubing: mandrel-bent
- Flanges: 5/16 in., machined
- Finish: black heat-cured, high-heat-resistant paint
- Country of origin: China
In the box: one exhaust header with all hardware included. Each application calls for one, so this single listing covers the vehicle.
Frequently Asked Questions
Will the Hooker 2451HKR work as exhaust headers for a 1967-1981 Chevrolet Camaro 5.7L?
Yes, the Hooker 2451HKR exhaust header is a direct fit for the 1967-1981 Chevrolet Camaro 5.7L. If you drive a different model, look it up in the "Vehicles it fits" section before you order.
Is the 2451HKR a long-tube exhaust header for the 1965-1985 Chevrolet Impala 4.4L / 4.6L / 5.0L / 5.3L / 5.4L / 5.7L / 6.6L?
Yes. The Hooker 2451HKR is a long-tube, down swept exhaust header and a direct fit for the 1965-1985 Chevrolet Impala 4.4L / 4.6L / 5.0L / 5.3L / 5.4L / 5.7L / 6.6L.
Does this Hooker Competition header include its hardware?
Yes. This exhaust header comes with all hardware included, and one header is in the listing.
What size primary tubes and collector does this long-tube header have?
This long-tube header has 1.625 in. (1-5/8 in.) mandrel-bent primary tubes of 16 gauge mild steel and a long transition collector with a 3.000 in. diameter.
How are the flanges made on this Chevy small block header?
This exhaust header has 5/16 in. machined flanges, a size chosen to maintain header integrity while staying pliable enough to seal each exhaust port.
