Bout to buy a dc fuel rail.. are they universal on bseries? Was used on a 1.8 but getting it for my b16.. is there a way to see if it will work or not frmo the outside? Like will it not mount up if it's only for 1.8? Thanks.

 

You should be more aware before you shop. Make sure its for your application.
Most fuel rails can interchange for example, I bought an AEM fuel rail for my car and it fits a b18c/b16a. Depends what 1.8 are you talking about? If its for a GSR or Type R the fuel rail would most likely fit. If its for an LS then I have doubts it will fit. The b18c heads are similiar and almost alike with b16 heads.

 

Hm I've heard that all bseries work with each other..?

 

not on the head. that's a good example, take a look at an ls intake mani, then a type r, you'll see the difference