So we installed another of these phenolic runner spacers on my mates stock M35, unfortunately he does not frequent this forum but this is what he had to say (cut and pasted from an email in which I asked him what difference, if any, he has noticed with the addition of the spacer).
Went to the airport and back last week, then to Leongatha (waved to your house on the way past) on good friday and up to Corowa (NSW border) for the weekend....
10.4 l/100km.. That is the lowest I have ever had, even lower than when I collected the car and drove back from Sydney like a wuss, because I had no numberplates..
688 kms range... Could easily have done over 700 as refuel was only 72 litres...
As stated, car holds 5th gear much better and there is off boost performance.. Very happy thanks!! And engine cover is happily fitted with just the rear nuts holding it on..
will try to get some longer studs for the front sorted out.
Thanks again.
So it seems that the recurring theme from this mod is greater off-boost performance, more torque and the car holds 5th much better while cruising
If interested, please either post in this thread or PM either Andy65b or Jetwreck.