any time you have a question about a abbreviation. ill help ya out . a v/b is a valve body and a t/c a torque converter. when some one says they have 90's its probably 90hp injectors, fast 150- taking lift pump, arson stage 1,2or 3- talkin about cp3. twins of course mean twin compound turbos. willy whistler-refers to a diy(do it yourself) intake mod. silencer ring- ring inside turbo once removed turbo is louder also a free mod. if they say they have billet tranny- means everything is made from billet inside tranny like (output shaft, input shaft, intermediate shaft, billet flexplate) just shoot me a pm if you have trouble understanding the lingo lol.