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machined spring seats
Magnets in oil pump to help protect gears and pressure relief valve
Heavy duty
advance slope and rpm limit (in 100 rpm steps)
The threads are different
1999-2005 DYNA - BIG BORE 4.5 "WORKS EDITION" Item material:Black Onyx machined spring seatsPRECISELY PIE CUT AND TIG WELDED BACK TOGETHER BY HAND AT OUR FACTORY RIGHT HERE IN LAKE ELSINORE, CA. A METICULOUSLY PAIN STAKING PROCESS, BUT THE RESULTS ARE A WORK OF ART IN THE END. 4. 5 HIGH FLOW PERFORMANCE ROLLED CONE MUFFLER WITH STEPPED BAFFLE FROM 2 TO 2 INCHES. INCREASES BOTTOM TO MID RANGE TORQUE AND HORSEPOWER ON ALL MOTORS. TUNED PROPERLY CAN ACCOMMODATE 88" TO 143". 065 STAINLESS STEEL HEADERS, STEPPED FROM 1 TO 1 7 8 TO 2 AT THE