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....
Since this forum has been rather quiet lately, I thought I'd create a thread with something a bit more fun to discuss for once. The topic is - What is it about owning and driving your Skyline around that pisses you...