Side exit staged performance header for big & small tire Mini Bikes   
1" OD primary with 3 stages up to 1 5/16". 
3" from inside of pipe to flange surface for small tire or 5" for big tire 
All our performance Headers are staged and spaced for the broadest  power curve
Can be used with our RTT Muffler or a clamp on 1 5/16 muffler
Fits Honda and Clone motors also