Cause 99% of the buying public has no idea who Bloomer is or if they can be trusted.
(Not saying they can't be.)
You think if Edelbrock had a CNC version of there RPM head that beat TF they couldn't sale them ? and or AFR etc.. or even SM.
Why are TF being sold by the truck load but not Bloomers ? obviously Bloomers are the better deal, probably cause TF has a good chunk of the market and ease of availability.