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Author Message   Sdecp Posted on Saturday, February 19, 2011 - 09:39 pm:        I bought a pair of Thunderstorm stage II heads for my bike last year and have a pair of Thunderstorm heads with 14.5K miles on them available. If anyone is interested, make an offer. (Message edited by sdecp on February 19, 2011)   Flatheadbill Posted on Monday, February 21, 2011 - 09:43 am:        pm sent   Sdecp Posted on Monday, February 21, 2011 - 11:49 am:        Hey Bill, PM replied   Flatheadbill Posted on Monday, February 21, 2011 - 07:41 pm:        My mistake. Thought the stage 2 heads were for sale.   Sdecp Posted on Monday, February 21, 2011 - 07:48 pm:        Sorry Bill, the add is a little confusing.   No_rice Posted on Monday, February 21, 2011 - 08:30 pm:        so this seems like a dumb question to me, but what are the stage 2 heads? i know what the regular thunderstorm heads are. did you have someone put in bigger valves and such or?   Sdecp Posted on Monday, February 21, 2011 - 09:15 pm:        Tim: Because I do not want to embarrass myself, I pulled this from the NHRS website. I actually had mine done by Revolution Performance and have been extremely happy with my buy. For the XL/Buell owner who wants more torque and horsepower, the NRHS Stage 2 CNC ported cylinder head is the answer. These heads are capable of making your XL or Buell absolutely rip! Like the Stage 1 service, the Stage 2 service includes porting on a state-of-the-art CNC machine to ensure a quality and performance level simply not achievable with hand porting. But Stage 2 also includes all new premium quality Hurricane stainless valves, high performance springs, titanium retainers, 10 degree locks, and bronze manganese valve guides!. The valves are oversize as well to increase flow and cylinder fill: 1.760/1.530 sizes for 91-03 XL & Blast heads, or 1.850/1.615 valves for Thunderstorm, XB, and 2004 XL heads, 1.715/1.480 for 883 heads. These larger valves are designed for maximum flow while maintaining excellent velocity, which is absolutely key to making big power over a wide rpm range. In fact, a Stage 2 head will generally produce more power over the entire rpm range than a Stage 1 head (assuming matching components), not just high rpm! The NRHS Hurricane springs with titanium retainers and 10-degree locks will accept cam lifts up to .600" lift (higher lift capacity springs available upon request for no extra charge). These heads are a popular choice because of their versatility to be utilized in both mild and wild combinations. The premium hardware and oversize valves to complement the CNC port work makes them a terrific value as well. All of the careful documentation that goes into a Stage 1 head in regards to assembly and overall airflow balance also pertains to a Stage 2 head.   Bcox Posted on Wednesday, February 23, 2011 - 08:05 pm:        How much are you asking on the stock heads?   Sdecp Posted on Wednesday, February 23, 2011 - 08:39 pm:        Hey Bcox: $350.00 plus shipping

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