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21021HKR
4" Sidetube Slip–In Mufflers Super Competition 4" Sidetube Slip–In Glass Pack Muffler; Sold In Pairs. |
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21002HKR
4" Sidetube Slip–In Mufflers Super Competition 4" Sidetube Slip–In Muffler; Sold In Pairs; All Metal Small Block Reverse Flow Design |
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21003HKR
4" Sidetube Slip–In Mufflers Super Competition 4" Sidetube Slip–In Muffler; Sold In Pairs; All Metal Big Block Reverse Flow Design |
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21046HKR
4" Sidetube Slip–In Mufflers Maximum Flow 4" Sidetube Slip–In Muffler; These high performance mufflers produce an average of 23% more power than open headers |
