Been looking at this for a while. Might do it if I do the Audi R8 Coil Packs...since everthing will be out in the open.
Adds length to the runners of your intake manifold. Generally speaking, longer runners produce more torque while shorter produce more horsepower. Like I said, that is a rather broad generalization. To your point of the throttle body space, they are almost categorically worthless for modern fuel injected engines.How exactly does this increase performance just less heat soak like a throttle body spacer ?
Oh I agree! I just had to replace the #1 coil, was grumbling that it could have at least been one of the even numbered coils to kick it. The spacer made it easier to get that out and back in. If Nissan notched the intake just 1/2" in, the plug would come right out as well.For me, it was worth it just for the ease of replacing the #1 and #3 spark plugs! I no longer have to take the #1 coil apart to get it through the opening in the manifold!