Scroll to the bottom for titanium drag racing valves. Buell XB9 (2002-2003) PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0302 EX 1.575 .2754 4.610 25 DEG. FLO. STOCK SIZE TRIPLE GROOVE $25.00 ea. HD0303 EX 1.615 .2754 4.610 25 DEG. FLO. OVERSIZE TRIPLE GROOVE HD0300 IN 1.810 .2755 4.520 25 DEG. SUPERFLO STOCK SIZE TRIPLE GROOVE HD0301 IN 1.840 .2755 4.520 25 DEG. SUPERFLO OVERSIZE TRIPLE GROOVE HARLEY DAVIDSON® - EVOLUTION & TWIN CAM (1984/2004) PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0501 EX 1.572 .310 4.523 25 DEG. FLO. DISH HEAD BLACK NITRIDE $25.00 ea. HD0145 EX 1.615 .310 4.531 24 DEG. FLO. STOCK SIZE HD0275 EX 1.615 .310 4.531 40 DEG. FLO STOCK SIZE HD0507 EX 1.615 .310 4.523 25 DEG. FLO. FLAT HEAD BLACK NITRIDE HD0500 EX 1.615 .310 4.527 25 DEG. FLO. DISH HEAD BLACK NITRIDE HD0045 EX 1.625 .310 4.531 24 DEG. FLO. OVERSIZE HD0251 EX 1.625 .310 4.430 HARLEY/EDELBROCK HD0502 IN 1.900 .310 4.441 25 DEG. FLO. O.S. DISH HEAD BLACK NITRIDE HD0503 IN 1.944 .310 4.444 25 DEG. FLO. O.S. DISH HEAD BLACK NITRIDE HD0504 IN 2.022 .310 4.438 25 DEG. FLO. DISH HEAD BLACK NITRIDE HARLEY DAVIDSON® - EVOLUTION (1984/1998) PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0285 EX 1.625 .310 4.511 24 DEG. O.S. HARLEY/EDELBROCK $25.00 ea. HD0143 EX 1.750 .310 4.531 24 DEG. FLO. OVERSIZE HD0144 IN 1.850 .310 4.444 24 DEG. FLO STOCK SIZE HD0046 IN 1.900 .310 4.444 24 DEG. FLO. OVERSIZE HD0284 IN 1.940 .310 4.424 24 DEG. O.S. HARLEY/EDELBROCK HD0044 IN 1.940 .310 4.444 24 DEG. FLO. OVERSIZE HD0252 IN 2.000 .310 4.345 HARLEY/EDELBROCK HD0146 IN 2.000 .310 4.444 24 DEG. FLO. OVERSIZE HD0317 IN 2.100 .310 4.444 24 DEG. SUPERFLO. OVERSIZE HARLEY DAVIDSON® - TWIN CAM (2005-2008) PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0302 EX 1.575 .2754 4.531 25 DEG. FLO. STOCK SIZE TRIPLE GROOVE $25.00 ea. HD0318 EX 1.615 .2754 4.531 25 DEG. FLO. OVERSIZE SINGLE RADIAL GROOVE HD0319 IN 1.800 .2755 4.425 25 DEG. SUPERFLO STOCK SIZE TRIPLE GROOVE HD0320 IN 1.900 .2755 4.425 25 DEG. FLO. OVERSIZE SINGLE RADIAL GROOVE HARLEY DAVIDSON® - XL883 PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0312 EX 1.350 .310 4.645 24 DEG. FLO. SUPER ALLOY $25.00 ea. HD0311 IN 1.590 .310 4.526 24 DEG. FLO. HARLEY DAVIDSON®- TITANIUM (DRAG RACE) PART # TYPE HEAD DIA. STEM DIA. OVERALL LENGTH REFERENCES PRICE HD0401 EX 1.750 .310 5.600 25 DEG. (BLANK STEM) $110.00 ea. HD0402 EX 1.850 .310 5.600 25 DEG. (BLANK STEM) HD0085 EX 1.940 5/16 6.500 25 DEG. TULIP FLO (BLANK STEM) HD1384 EX 2.000 5/16 7.000 25 DEG. TULIP FLO (BLANK STEM) HD0089 IN 2.100 5/16 5.600 25 DEG. TULIP FLO (BLANK STEM) HD0084 IN 2.300 5/16 6.500 25 DEG. TULIP FLO (BLANK STEM)