From Motosport.com- Notabiker 08-27-2016
After going through the kibblewhite catalog and cross referencing sizes, I found these work as a replacement valve stem seal for my 1999 Suzuki TL1000R. Oem ones don't have the choker spring, just the tension spring that holds the seal onto the valve guide, these being style 4 have choker springs that better seal the valve stems. This one specs at 5.5 × 11 × 8.6mm with 5.5 being the stem diameter. Anytime I have to replace valve stem seals I use the red viton kibblewhite ones even if I have to spend hours researching which ones will fit my old odd motorcycle!!
From Ian King, 9 Times European Top Fuel Champion Chooses Kibblewhite Precision Machining, Inc. - 04-08-2016
From Tim Hailey's Facebook Wall - 03-28-2016
Can't tell you how much it means to be partnered with the absolute best in the performance business, including the finest in valvetrain components—Kibblewhite Precision Machining. Thanks William Kibblewhite for your continued support.
From Jason Kroll's Facebook Wall - 02-18-2016
Got my #Kibblewhite studs today for the 103 tc.. no more worry of using a rotational torque measure for head bolts.. torque em down and forget em.. the last major part to get back to my road king buildup.
No question about it ,these are the best shovelhead valves you can buy!