Quote Originally Posted by 94vtirozguy View Post
Hytech and SMSP have multiple designs and are different manufacturers, and each of those manufacturers ask for the specs of your engines as they have different designs / specs for the setup you send.

So how can 1 set of headers combine multiple different specs from different manufacturers .......

congrats on the buy and gains but don't believe everything on ebay
Take some time and study both of their H series headers carefully. Both companys use a very similar design and for obvious reasons, there really isnt much space in the prelude chassis for many different variations (compared to EG/DC chassis)