| Information Concerning the 5" Exhaust |
| All measurements are done at 10 ft. and taken with a Heath Spectrum Analyzer 5" Straight Pipe Idle 94 decibels (db) peaks 94 db @ 180 hz 88 db @ 45 hz Frequency response range - 31.5 hz - 2.8 khz 5" Straight Pipe with 9" x 18"Nelson Resonator Idle 91 decibels (db) peak 88 db @ 45 hz 85 db @ 63 hz 91 db @ 125 hz Frequency response range - 31.5 hz - 180 hz 5" Flex Pipe, 9" x 18"Nelson Resonator moved towards the cab, 5" turn down. Idle 91 decibels (db) peak 76 db @ 31.5 76 db @ 250 hz 82 db @ 45 hz 76 db @ 355 hz 88 db @ 63 hz 76 db @ 500 hz 91 db @ 90 hz 88 db @ 125 hz 82 db @ 180 hz Frequency response range - 31.5 hz - 500 hz OK, the drone finally got to me, I added a Walker Muffler 22771 5" In / Out to quiet things down And the reults are, 78 db @ 31.5 76 db @ 250 hz 81 db @ 45 hz 75 db @ 355 hz 84 db @ 63 hz 75 db @ 500 hz 87 db @ 90 hz 88 db @ 125 hz 84 db @ 180 hz Frequency response range - 31.5 hz - 500 hz |
| The Costs: $125 4" Downpipe $100 5" x 10' Straight Pipe $150 5" Tail Pipe $68 5" in/out resonator - Nelson 9"OD x 18" long $40 5" Tip $66.79 5" in/out muffler - Walker Muffler 22771 |
| Looking for parts? Try - Rip Rooks (TDR Member) Stans Headers NAPA Engines Inc., Cummins Dealer Summit Racing Rock Auto |
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