Jeep09

LS3 injectors in L92 manifold-FAST spacers - need Oring help. I have a L92 manifold, LS3 injectors & the FAST spacers, the FAST orange o'ring is to fat for the L92. Anybody know the correct o'ring size?

A few washers will space the L92 rectangular rail in place. Thanks

Jeep09

Still looking

Jeep09

answer is Fel-Pro ES71190 , thanks LS1tech

Crf450r420

iTrader: (1)

FAST also has O-rings large enough.

Jeep09

the Fast Orings were too thick, correct ID, wrong OD

Crf450r420

iTrader: (1)

They have black ones that work. I could almost guess the part number since we do use about 30 sets of them each year. Think it's something like 7.2mm with a 4.1mm cross section, but not sure as we just order them 100 at a time now.

Jeep09

If you new the part number that would be great

LS1MCSS

iTrader: (18)

Was the p/n you were given in your first post not the right one?

Jeep09

They seem good, just thought I would have the FAST pn for a back up

Crf450r420

iTrader: (1)

FAST 54043-302 4.1mm cross section and 7mm I.D. couldn't read the other spec. We use them all the time to run Holley injectors and FAST intakes and GM LS3 intakes.