stv951

Starting a 1986 2,5 951 engine rebuild. Planing on going for a hybrid new gen turbo and about 1,2 - 1,3 max boost.

last time i did this i used a cometic head gasket but i didnt find these for sale anywhere.
What do you guys use ?
Also, which rods and head bolts makes ?

V2Rocket

I like regular Victor Reinz gaskets but if you are set up for a MLS Cometic is still around...
http://www.cometic.com/i-24766598-po...f=brand:101689

ARP and Raceware make new rod bolts/nuts. Both also make head studs but I like the stock studs better.

Black51

I use Victor Reinz with LR steam vent. No problems yet.

stv951

Isnt MLS cometic the best way to go ?
why use the standard Reinz ?
are there any disadvantages with the cometic ?

944crazy

I used the Cometic MLS in my recent rebuild. So far I've done a bit over 4000km's on it including two track days. It's held up well so far. There are others with many more km's on theirs.

I had both the head and the block machined, and I used ARP headstuds torqued to 85ftlbs. I also lightly misted both sides of the head gasket with vht copper gasket spray.

I bought mine on ebay, but I believe lindsey racing stocks the cometic in various thicknesses for the 944.

ealoken

OEM has been fine on my 951, 30 000 km and 20 psi of boost. ( vitesse stage 2 turbo )

V2Rocket

no disadvantage except that you need to prepare the block and head surfaces a little more to use the MLS gasket so they are very smooth/flat.

the stock Reinz gasket is a little more forgiving to an imperfect surface (service replacement, block in car is hard to get perfectly clean but the head you can have cut smooth/flat at a shop.