If you have never driven a 16 valve Zuk, you are missing out! I cannot believe the difference! I was expecting a fair bit of improvement, but I am amazed! It just keeps pulling, and mud is so much funner with horsepower! No bogging, just instant mud flinging at will! Grass is uprooted and thrown at 1 stab of the throttle. Some people told me that a header and a Weber would be all I need, I am SO glad I went this route. It cost me a little more than a Weber and a header, so anyone can afford it. I bought a totalled 95 Tracker for $900. Parted it out on Ebay for $1100. Spent about $600 to get it in and running (harness, fuel pump, and adapter kit). Thats $500.00 out of pocket. I HIGHLY recommend this to any one thinking about doing it.