Opposite_Lock wrote:yeah i know their speakink about exhausts on other threads but im choosing by your overall experience with these brands for exp. electronics , intakes, exhausts, suspension, blow- off valves, internals etc...
Well, they are all decent brands for certain applications. But some have stronger attributes in one area, where they might be weak in another. It really is a part by part comparison, you would be hard pressed to find one overall superior after-market company.
For example, Apex makes excellent exhausts, their suspension systems are pretty good... but their electronics (turbo timers and what not) are average at best.
On a side note, I don't think any of these companies you mentioned make internal upgrades.