Hey guys does anyone know if CMI 520 etop headers part number 650-13178 will fit on a 502 mag?
suffered from a cracked manifold today and looking to buy a good used set of CMI headers
thanks

Most likely will not fit, at least not without modifications. I think the bolt pattern where the mate to the heads is different. Call CMI to verify.

thank you griff, from my understanding a few others on here have drilled other cmis for bbc bolt pattern vs nonstandard just wasn’t sure what bolt pattern the 520 etops came with

Following........

Will using CMI headers void your warranty? I was told the E tops will bolt onto factory 520s....have a call into CMI to verify.