Hi mate, I have had Neils TNS Elite 5 for only a short period, I have also had the stock P5, with comparison, the Elite 5 has loads More bottom end power, still has a great top end, however imo its a truggy engine with a bottom end that's required with truggy! It has a extreme Bottom End compared to the P5. Checkout Neils Dyno results on his facebook page, they are awesome results! Good value for money engine, keep in mind, break in off ANY engine, is the key to a quality engine that performs well- DONT RUSH IT !