they are available in 1-1/16 to 1.5 inch thickness.. i think that ought to clear
https://www.drgas.net/category.php?cid=45&catid=5
also the very reason they are on nascar cars, where they are called boom tubes.. is to disperse the "crack" from fumes exploding in the exhaust and mellow the boom to a rumble.... it will do the very same on your "ricer-spec" monster engine.... (no disrespect intended :-) )