Its is very common to have the intakes crack on 2 valve cars all of there intakes are plastic. I am sure someone will chime in with a story. Personally it has happen to several people at the tracks I have been to.
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2001 cobra
Solid axle swap 4.30's
Mac H-pipe Bullitt cat-back
Steeda uppers.
K N open Filter
12.344 at 110.24 mph
with a 1.796 "60"
on wore BF Dr.