I have a 1995 trx300ex and i am going to buy a cobra aftermarket exhoust and i need to know what size my stock header outlet is to fit it so i dont get the wrong size. if anyone can help me by telling me or telling me where i can find it, it would be much appreciated thank you.

 

can't Cobra tell you?

 

Nothing personal, but Cobra is crap, just noise, and poor quality metal that will rust out and leave you needing a new exhaust. Another thing, the stock 300ex head pipe is a major bottleneck, very tiny,a slip on will not see much power improvement. Save up and get a decent full system, if money is a problem, look on eBay for a good used system, then open up the airbox lid with some holes, go up about 2 sizes on the main, and 1 on the pilot jet, and you will notice some horsepower.