Your VR4 heavily modded?
Have not use NGK7 before but have tried Denso Iridium IK22 which is about NGK7 heat range. To me not much difference since my VR4 is standard stock engine. Currently using back NGK6 heat range only....
* feel bumpy even on straight road with hard setting (I am feel like riding a horse now)
* have soft weird squeaking noise (like rubber rubbing on each other)
* have a one weird knocking sound when full right steering turn
i am experiencing all the above on my 2007 swift sport , sound from front right.is it faulty and gone case?
what setting are you currently at for front and rear?
Are you using BC spring 4KG / part...
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