X51 Engine Upgrade

[1101mv]

Will the X51 engine upgrade kit fit a 1999 996 C4, and if it does how much would it cost for install?

[Loren]

There are two kits. One for 3.6 liter (MY2002 and newer) and one for 3.4 liter cars. The 3.4 liter kit was never offered for sale in the US and may be very hard to get. I have seen prices for both kits between $8000 and $10,000. Installation requires removing the engine and a partial disassembly - including changing the cylinder heads and camshafts. The (3.6 liter) install TSB estimates about 26 hours for the work.

[smithmotorworks]

I have a 99 3.4l C2 and am in the process of installing the Carrera power kit.

I own a performance shop and race this car in PCA , PBOC etc.. so we are doing the install.

The kit was never sold in North America, so getting info on it has been very hard.

I tried Porsche Motorsports, Porsche North America, and several dealers including Brumos. I was told by PNA that they could not even acess the tech info. for legal reasons.

Some cars Depending on VIN will have to change pistons. Since I am on my second motor I already had the newer version.

The kit comes with everything you will find in the x51 package. they are the same but I don't think it was called by its option # until it was available here for the 3.6.

THe 3.6 and 3.4 are the same bore just different crank and rods(stroke).

We should be done and racing at Sebring on the 11th and 12th

Today is Labor day and I am at the shop putting this motor together , Braving a Hurricane thats headed right for me, to finnish for a race that I not sure wether they have or will cancel.

What a race junky I have become! :drive:

[JimB]

Any chance that you will be bringing your 996 to the club race at VIR. I'll have my 99 (updated to 04 X51 specs) there. It's always fun to get on the track with another 996.

[1101mv]

Found A great deal on the X51 on my99 C4, for $5000. Do you think it is worth it. The dealer is going to put in new engine due to the fact of RMS under warranty. How much extra should I pay for install for the X51 considering that they will have the engine out of the car all ready and I also have the GT3 radiator already installed in the car so they don't have to remove the front bumper. Do I have to change out the piston also? Thanks.

Edited September 10, 2004 by 1101mv