Do you think it is just coincidental that your hot running problem happened at the same time as your new exhaust? I am curious about this, as I am (or was...) planning to do the identical Timevalve system on my 4.5

It must truly just be coincidental timing, no?

What do you think of the timevalve system overall, assuming it is not causing your heat problem?

Cheers,

JAS

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94 E320
71 350SL