4" Sidetube Slip-In Big Block Reverse Flow Muffler Racing Optics Fitting: L3 S20 S40 SOHC

Fitting: L3 S20 S40 SOHC (black 40mm ID speedo gear)

Precision CNC laser cut

Even increasing drivability with smoother idle

Bins values on the X and Y axis can be changed too

4" Sidetube Slip-In Big Block Reverse Flow Muffler Racing Optics Fitting: L3 S20 S40 SOHCFor 4" sidetube sound control, Hooker builds long lasting slip in mufflers. These mufflers are easily removed for racing purposes. This all metal reverse flow style muffler is for small block applications and is quieter than our glass pack style mufflers. 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