The 2033 pipe and Conical header set runs good with this engine at 301 raceway, we have personally tried it during the capitol classic race last June,
we also tried the 2015 pipe with the PICCO conical header which gave us a little bit more top end, and we also tried the 2052 with a medium Nova Rossi conical manifold, it creates a lot more power but runtime was cut short,
2033 pipe set = good bottom end and making barely 5 minutes
2015 w/ PICCO conical manifold =more top end making 5 minutes
2052 w/ med NR Conical manifold = broader power band 4 to 4 1/2 mins. runtime
2052 w/ long NR Conical manifold = more bottom less top still less than 5 mins runtime