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Hooker Sidetube Slip-In Mufflers

4" Sidetube Slip-In Muffler; Sold In Pairs; All Metal Big Block Reverse Flow Design

Vehicle Type
  • Classic Muscle Car
  • Street Rod

PART# 21003HKR

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Overview

For 4" sidetube sound control, Hooker builds long lasting slip-in mufflers. These mufflers are easily removed for racing purposes and are available in a performance style glasspack or our quieter all metal reverse flow style for small and big block applications. Hooker mufflers produce a high level of sound control without restricting engine efficiency. Sold in pairs.

Features:

  • Fits 4" Side Tube systems
  • Big Block Reverse Flow Design
  • Easily Removed For Racing
  • Efficient Design yet much Quieter than Glass Pack
  • High Level Of Sound Control
  • All Metal Construction

Specs

Automotive Item GradeHigh Performance
Body Height (in)4
Body Length (in)45
Body Width (in)4
BrandHooker
ColorRaw/Bare
Emission Code5
FinishNatural
FitmentUniversal
Inlet Connection TypePipe Connection
Inlet Diameter (in)4
Inlet PositionCenter
MaterialAluminized Steel
Muffler SeriesSide-Tube Slip-In
Muffler TypeSide-Tube Slip-In
Outlet Connection TypePipe Connection
Outlet Diameter (in)4
Outlet PositionCenter
Overall Length (in)45
Product TypeStreet Mufflers
ReversibleNo
ShapeRound
Sound LevelAggressive Sound
Type of MufflerSide-Tube Slip-In
Vehicle TypeClassic Muscle Car
Street Rod
Part Number21003HKR

Emissions

5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

      Some parts are not legal for use in California or other states with similar regulations.

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