Far too ambiguous Mr Bug.
Take exhausts, we're lucky that eternal make a cat back system worthy of the name, and for a reasonable price. If they didn't whats the alternative?
GM used to make the oe system available on tc for £300 quid odd. No brainer, 7 years life, quiet, reliable, chromed slash cut tail pipes, clam shell design, double skinned. Excellent quality for the 3.0/3.2 etc.
They didn't tell anyone, but they reduced the quality of the cat back system to an appalling level. All for the same price.
Do we recommend vx for exhausts now? No. We recommend eternal. Because they likely last longer, for almost a third of the price.
It's not a question of using pattern parts out right, or only ever using vx parts because they must be best, right? Wrong.
We recommend stuff here from experience. The life of the part v the cost of the part.
NOT the cheapest old shite that last two minutes and causes more damage in the brief time it's on the car than a bunch of vx "mechanics" at £90 an hour.
And if iirc, it was James who recommended Eternal, and good on him. But he only went looking knowing the GM ones where crap. And iirc it was one of my post that contributed to that.
That's how it works. Experience. Hard earned. We air a problem, and usually we collectively find a solution.
What we don't do, is post flippant rubbish to "help" others based on a whim.
Re cc seals, if we find a cheaper alternative i'd strongly suggest posting that they are unproven, or reliability unknown, or even better, i've tried these myself and they are good/bad/indifferent over the life of the product, or similar. Because there would be a risk to fitting that part, therefor the owner will need to keep a close eye on oil leaking into the plug wells and causing miss fires.
Certainly if I posted some of the crap advise seen here I would expect a bollocking later when it all goes wrong from the owner. Be careful please... IMO.

I'd like to think the above was stating the obvious tbh, but there we are.
