well... last weekend i raced using this max pipe for the 1st time into my stock TZ3 ( previous i was using nova 2630 ) what i can say is that it works great....good/maybe awesome
power band from bottom,mid and top....the most critical difference is the mileage...less fuel consumption comparing to the other (maybe 10-15%)
the engine idles good too....i overturn and broken something,for at least 20-30 second b4 my pitcrew pick it up and return to the pit
the engine still idling sweetly