Waste of money, maybe, if the warranty is never used, and that's a flip of the coin. I've had extended warranties (Ford ESP) on my last 3 vehicles and so far have only had to use it once. Some repairs a very expensive, some not. I prefer to pay a little now than a lot later. Comes down to...
Complaining?? You obviously have me confused with someone else as, I was only pointing out your comment about A7's being, "a single purpose compound for cold temp auto cross", was not entirely accurate. And, I never said I had problems hooking up, holding power. Once the A7's heated up they...
From a different forum on this subject:
PSA: not an aerodynamicist, but I am an engineer.
It may seem a bit counterintuitive, but aerodynamically it is possible that you would want these vents closed if there's no cooler/cooling needs.
For ground effects to function, one thing that is...
For many years tires sizes have been the same all around., mainly to make rotating them easier. Not long ago, cars began having "staggered" size tires as they provided better handling, traction and performance. Race cars, etc., have had staggered tire sizes for years....and as more and more...
Don't just rely on a report or technician telling you your air filter(s) need replacing. Check out the filter yourself, looking for gray or brown colored filter element and dirt particles in between the creases. Most air filters can be blown out, removing dirt particles and continued to be...
There's been more crap out on the highways over past 5+ years and city/county/state are slow in cleaning up the debris, hence, cars getting dinged up more often.
Good choice. Diff between R7 and A7 is the A's warm up quicker, but don't last as long. R7's take a little longer to heat up to optimum (usually an extra lap), but last longer.