I read in another topic that you like the P5XS as one of your favorite truggy engines. I run that engine in both my buggy and truggy with the Nova 9886 pipe and short header. Is that the pipe your are using in a truggy or should I try a 9856 with the same header for more punch? I also have a longer header. I understand that longer headers will produce better bottom end at the expense of some run time, if that is correct? Also, what carb restrictor would you recommend for the buggy? I'm tying to take some of the power away so I can control it better. I have the stock restrictors in both engines now. How do the L or " ] " shaped headers affect performance and runtime? The only pipe I ran with that type or shape of header was the OS T-2050 on a V-Spec which hit pretty hard in the middle. Is that a characteristic of this type of header shape? Thanks. You said to ask questions and I usually have a lot of them.