Shock - I noticed my QA1’s were a bit tweaked after 16k with 10 or so track days. Driver’s side was soft as butter, passenger pretty stiff. This probably came from me running my qa’s at high compression and rebound. Like 8’s to 10’s. QA recommend a group in CA called Naake who rebuilds 20 different brands. Naake said QA1’s are good shock but recommended them run at a compression about 2 or even 1 and rebound about 3 or 4. Otherwise, they are bricks and you’ll damage them. They rebuilt them for $90/shock and came back looking like new.
Naake Suspension Specialists
Naake, Inc.
2300 Central Avenue
Roseville, CA 95747
916.771.0109 Phone
Naake Suspension
Also, I’ve found the black Teflon qa1 rod ends that come standard will wear out fast, like 3-5k miles. You'll be able to feel a slight amount of slop if you jack an Sl-c corner up and force the wheel side to side/top to bottom. I’ve switched the Stainless steel models that last a whole lot longer.
https://www.summitracing.com/int/parts/hal-com8t-102pk/overview/