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I have a 140 thermostate, what would be the correct thermostate to install ???

Can I use a 180 or should it be higher ????

Sheikman

Stock is a 140 or 160. I wouldn't go any higher than a 160....

"Bad-Habit"

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Thanks for all the suggestions.
Found a leak between the manifold and risers.
Aluminum EMI Thunders, with stainless bravo risers.
Used Indian Head Sealant and it did the trick.

Thanks
Sheikman