New 502/454 Lightning headers
#13
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#14
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Are these still for sale? If so, what are your cam specs? I am getting a 540 built right now. I would be interested but if we are running similar cam profiles, I would have the same issue.
#15
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The cam ended up not being an issue. I was me trying to tune a new comp. from scratch. HAd too much something going on at idle. Anyway $5000 later on headers and I'm good. I ran these with success with the "731" crane cam. my buddy ran the "741" with the same ones. My cam now has a 114* lobe separation 234/242 dur.
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So I take it you still have them. Email me your phone number and I will give you a call. I want to learn more how you made the decision the reverision issue you had was not cam related. I will have a similar spec'd cam as you. I currently have EMI Thunder with silent choice. The 540 and the cam I will be using won't work with this exhaust set up. I have been looking at buying longer risers for the EMI Thunders. In any event you can email me at [email protected].