6.2L MPI verses 6.2L MPI "Horizon"

[Mwctexas]

....I'm not finding it.....what's the difference....Horizon?..thanks

 

[mainstream]

Horizon uses closed cooling only uses sea water for cooling coolant not raw water thru engine

 

[Mwctexas]

Thanks mainstream.....does the coolant or raw water cool the exhaust manifolds?...if it's coolant...do the manifolds/risers ever need replacing?...thanks..

 

[Go Aweigh2452]

The manifold and risers are ceramic coated inside and extends their life dramatically. I have the 6.2 MPI Horizon and the other difference between the 6.2 and 6.2 HO is the HO has a single point air actuated water drain system which means I can winterize the engine in about 45 seconds. The 6.2 has the manual three point drain system (blue plugs)...