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Just wondering if there is any difference between the 98 Zrt and 99 Zrt engine. I know they are piped different and maybe thats the problem, but the 98 will eat the 99.
thanx
 

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The 99s had a breathing problem aka restrictive airbox

This is why they were slower and put out less HP :)
 

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I also heard that from a Cat racer a while ago - Cat had an airbox restriction in the newer ZRT's. I don't recall the year(s) though.
 
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