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madmods - I have the Spec stage 2+ with Fidanza flywheel and have had what is called harmonic vibration since it was installed. It's very noticeable and will drive you nuts. You feel it most letting off at around 3k. I called Spec and was told 'it's normal to have harmonic vibs. with a billet flywheel'. The answer was kind of a 'get used to it' thing.

Randy and Dave at DDM have been driving mine and they feel the vib as well - and don't like it. Randy is planning on installing a Spec stage 2+ in his car but not the Fidanza flywheel. When he gets it installed - if he has no vibration - then the flywheel is the problem and I'll have mine pulled and re-install the stock flywheel.

I even bought a GXP clutch to have 'standing by' to use if I still have a vibration after changing the flywheel out. I don't know if it will fit, but I'll give it a shot before going back to stock or spending the cash for another aftermarket unit.

__________________
TEAM SOLSTICE 2008
NASSOA(tm) Founding Member #2
1st 1K #781
DDM Custom Turbo System
DDM Pro-Beam, A-Pillar Pod, PLX gauges
Starlight red I/C pipes and coil cover
GReddy Profec B Boost Controller, HKS BOV
3" Magnaflow cat-free
Werks radiator / Precision billet grilles
Norms vented fenders / GXP Spoiler
Riken Raptor's 255/45/18

	carlintexas Member Join Date: May 2005 Location: Muenster, Texas	madmods - I have the Spec stage 2+ with Fidanza flywheel and have had what is called harmonic vibration since it was installed. It's very noticeable and will drive you nuts. You feel it most letting off at around 3k. I called Spec and was told 'it's normal to have harmonic vibs. with a billet flywheel'. The answer was kind of a 'get used to it' thing. Randy and Dave at DDM have been driving mine and they feel the vib as well - and don't like it. Randy is planning on installing a Spec stage 2+ in his car but not the Fidanza flywheel. When he gets it installed - if he has no vibration - then the flywheel is the problem and I'll have mine pulled and re-install the stock flywheel. I even bought a GXP clutch to have 'standing by' to use if I still have a vibration after changing the flywheel out. I don't know if it will fit, but I'll give it a shot before going back to stock or spending the cash for another aftermarket unit. __________________ TEAM SOLSTICE 2008 *NASSOA(tm)* Founding Member #2 1st 1K #781 DDM Custom Turbo System DDM Pro-Beam, A-Pillar Pod, PLX gauges Starlight red I/C pipes and coil cover GReddy Profec B Boost Controller, HKS BOV 3" Magnaflow cat-free Werks radiator / Precision billet grilles Norms vented fenders / GXP Spoiler Riken Raptor's 255/45/18