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Hooker Super Competition Sidetube Slip-in Mufflers 21021HKR

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Mufflers, Sidetube Slip-In, Glasspack, 4 in. Inlet/4 in. Outlet, Steel, Galvanized, Pair

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Manufacturer's Part Number: 21021HKR
Part Type: Exhaust Inserts
Summit Racing Part Number: HOK-21021HKR

UPC: 700414049489
Diameter (in): 4.000 in.
Exhaust Insert Style: Louvered core
Exhaust Insert Material: Stainless steel
Length (in): 33.500 in.
Quantity: Sold as a pair.
Notes: Performance style glass pack design. Fits into 4.000 in. diameter sidetubes only.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

These Hooker 4 in. sidetube slip-in mufflers have been developed for vehicles with 4 in. sidepipes, such as those equipped with Hooker Super Roadster and side mount headers. The mufflers are easily removed for racing purposes, and are available in a performance-style glasspack or in a quieter, all-metal, reverse flow-style. They produce an average of 23 percent more power than open headers, and feature a high-flow, perforated core that operates at 99 percent efficiency. High-temperature packing material absorbs noise while producing a powerful, mellow sound. The outer case is constructed of durable 16-gauge aluminized steel and protected by electrostatically applied high-temperature black paint. The inlet and outlet are 2.5 in. perforated cores in a 4 in. casing.


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1 Customer Reviews for Hooker Headers 21021HKR - Hooker Super Competition Sidetube Slip-in Mufflers

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Muff replacement

Summit RacingSummit Racing Verified Purchase

Can not really evaluate, these replaced ones that were in since 1975. Do not know if I will still own this Corvette in the future. Just finished putting car back together.

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Reviewer: JOHN from NJ

Date: March 05, 2014

Ease of Installation

Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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