Depends on what you're looking for. Sites that sell the more typical items, like cat-back exhausts, cold air intakes, suspension, etc, don't usually sell pistons and rods alongside unless one of those brands happens to make camshafts or something (example would be Skunk2; they make almost everything, but some of their products aren't as well designed as others), at least in my experience. There are 'aftermarket parts' stores, then there are 'engine building stores'. I could probably point you to a dozen sites but they're based in America, so if you're Australian the shipping could kill your interest. (*ED. - lol, just realized that was your video I responded to)
I've never ordered from CarID before, but I've definitely heard of them. It looks like a trustworthy site. The trouble when you're starting to get into modifying cars is knowing what parts brands to trust. Whether or not you're looking on eBay, there are brands out there with poor quality parts that still do well because there are people who only look at the price and believe in the trumped-up advertising. Before investing in anything, Google reviews for the brand and product. But never discount eBay for getting a good deal on quality parts; if it appears to be the part you want and the seller has an outstanding reputation/rating, it's probably not an imitation part.
US-based sites I've used and trust:
> ImportRP.com ($100+ orders get free shipping within the 48; my go-to site for low prices on aftermarket)
> PartsGeek.com (usually the best prices for maintenance/OE replacement parts, plus they have some aftermarket)
> RockAuto.com (same as PartsGeek, more of an OE-type store; great reputation but I've never used them)
> SummitRacing.com (*ED. - probably the best place to look for go-fast Camaro parts; they have great prices anyway)
> VividRacing.com
These sites are biased more towards Japanese cars, but you may still find what you're after:
> RealStreetPerformance.com (import engine building)
> JHPUSA.com
> ICBMotorsport.com (if you're serious about rare, classic, and otherwise high-end Japanese wheels, this is one of the better distributors; very Honda-biased otherwise though)
> EvasiveMotorsports.com
> PasswordJDM.com
A pain in the ass to change it since you literally have to cut it out fron behind the glove box.
)
Picked up some BC Racing BR Series coilovers and 22mm Whiteline front and rear lower swaybars. The difference is night and day, completely different car took all the "Wagon" feel out of it. Feels totally planted through corners with minimal roll, I have the dampeners set to 2 click stiffer from middle and I'm considering a little more.
