I recently purchased a new pair of TW heads with the intention of using a Stage 1 camshaft, but have since decided to step up to a Stage 2 unit instead. I understand that my current valve springs will not tolerate the lift of the Stage 2 camshaft and an upgrade is required to avoid valve float. Can I use any brand of valve spring with a sufficient rate or am I limited to TFS brand springs because of the head's configuration?
Ted Bell
Ted Bell