Increasing HorsePower -- What You Need To Know

[Unilevers]

10 thou is too low, honestly it just wont last. it will go for awhile but you will being doing it sooner than if it would have been at 14 or 15. it will also take very little shi#t and abuse before going quicker. ive gone as high as 18, but that was a specific thing.

if your there cut em to 14 and be done with it. im so sick of hearing "its within spec" from dealerships/shops. i dont see a "its within spec" on cummins engine specs. 90% of shops wouldnt cut em and just let it roll and you will be back again later.

my 0.02c

P.S. - i recently just fire ringed a ISX with Cryogenic Bolts. Being the first ISX i did it turned out great and honestly that setup is stout and if i owned my personal truck i would do it to it. much beefier than OEM fire rings and the install was easy and very inexpensive. maybe 1000 bucks more than stock. time will tell how it holds up but from just the materials used and my general opinon on the install i believe it will eliminate most head gasket issues on a ISX. just food for thought