This is a new pr. of gaskets made by Offenhauser to go between the base and top of their tunnel ram manifolds for Mopar 383, 400, 413, 440, 426 wedge and hemi, also Ford 429/460. This pr. of gaskets will fit any of those Offy "turbo thrust" intakes. *** tunnel ram *** .. ... ... keys: dodge Plymouth sox and martin super stock race car galaxie torino dart demon charger barracuda challenger coronet gtx gasser super comp pro stock ..... .. .. shipped in stiff cardboard first class pkg. rate rather than an envelope.