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I have the good fortune to be shipping my 04 Z06 to Lingenfelter for a na 427 engine transplant, complete w/ long tubes. I'm thrilled, of course, but faced with a decision. Should I, must I, get a new clutch? My stock clutch has 13,000 very easy miles on it and is trouble free. The new engine will be putting out a minimum of 530+/530 at the crank. I am a staid and older fella who doesn't plan to race except for the occasional times when I run up against an absolutely overbearing Porsche or Beemer or tarted-up rice rocket that won't leave well enough alone.

Lingenfelter offers an Exedy single disk clutch assembly with aluminum flywheel as an option, but I fear that will be a considerably more aggressive set-up for my daily driver. I really like the easy-going take-up and feel of the stock clutch. Cost is not the primary issue, since at this point I'm already spending a good bit and don't want to be penny-wise and pound-foolish. My big concern is getting a set-up that takes away from the sheer pleasure and ease of driving the car.

Please give me your opinion--I appreciate the expertise advice of others.
 

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I would definatley go with an upgrade. I have a basically stock 2000 FRC and i could feel the clutch start to slip when under hard acceleration. I then put a 100 shot of nitrous to it and within a few uses the clutch started to give. I replaced it with a Ram HD clutch and couldnt be happier. Also, now is the time to do it. Everything will be out of the way with the new motor going in. Otherwise it is close to a 10 hour job and not a fun one at that.
 
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