How does one know if ye has a genuine Toyota radiator or aftermarket.For reference it's a 97 80 but the radiator is not a plastic tank that's in it it is a copper and brass unit.Are their some numbers I should be looking for our stampings that are special I should be looking for on said unit. I hath sprang a leak and want to replace or fix it's not bad yet.Also on a side note is the koyorad c1917a good replacement as the csf is much money to spend.I could really use some advice.I have used search on here but needing some fresh info.