Total seals seem to work much better on domestics then they are the imports. THe imports (NOT ALL THE TIME BUT IN MOST CASES) Dont seal well compared to Hastings, the new JE spec rings seem to be much better. Thats from experience of using them in motors i have personally built. not second hand.
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-Mike
2015 Mustang Ecoboost
MBRP Race Exhaust - Lethal Performance Downpipe - Cobb AP - Adam Tuned
JLT CAI - UPR Dual Valve Catch Can