I'm there too.. pressed my first 3.4 on.. only to pull and sell it later on. For the little bit of extra cost.. an MPS is a good investment.

If you are SURE you aren't gonna do many more mods than a press on 3.4 will probably be just fine. The first car I ever put a 3.4 pulley on (our '00 SSEi) still retains that same press on 3.4, and it is at least 6 years later now, but its a DD and was never meant to be modded much. We also own a pulley puller so we can change it out at any time if we feel the need. However, my dads GTP and my GT both have MPS systems. Our '04 Monte has just a press on 3.4 however. We don't plan on modding those cars any further than that so thats all they need. Realistically, a 3.4 pulley is small enough for quite a few mods. You would probably need to do more than most think to be able to drop lower than that.

Just to throw it out there...Is there still a chance there could be KR with only a CAI? Obviously scanning is a must when dropping sizes, but don't some people end up having to run a 3.5"? I guess I'd strongly vote MPS. Come summer if you haven't done anything else and you're seeing KR it'd be nice to have the option to throw on a 3.5" rather easily.

A CAI can CREATE KR. It cannot PREVENT it.

....and then there is Shadd who runs a 3.0 with no intercooling, stock cam and no water injection.

FWI can prevent it

An extremely well designed CAI with awesome shielding can prevent it....

If you dont do the CAI right you will GET MORE KR BECAUSE OF IT.


Also is the intense puller as easy to use as the ZZP one? anyone used both before?

That sounds like fun!

hey if ya interested in buying a 3.4 mps let me know i stil have a BRAND NEW intense one aval.

Hans, a FWI can prevent SOME KR MAYBE if SOME of it MIGHT have been cause by high intake temps.

It'* not a KR cure or KR killer. But it'* good practice.

Shawn, he'* not kidding. Shadd runs a 3.0" on pump gas with only 5 degrees of KR, but that'* off-topic.