I run one of the Summit ones in the black car and a Griffin in the silver car. I have not had a problem with either of them and then are both good quality. Both of them also needed a lower flex hose, as the lower radiator hose location is not in the same locations as a stock hose.
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SC Motorsports
11801 State Road 52
Hudson, FL 34669-3092
(727) 856-8768
FordSpeed Racing
11733 66th St., Unit 123
Largo, FL 33773
(727) 549-8255
Dynojet Chassis Dyno