The 8.3L Arias-Fontana; the forged-aluminum CE engine; and most aftermarket cylinder heads, including the latest billet heads. Titan roller rockers enable the intake ratio — which varies with pushrod length — to be set as high as 1.7:1.

(Please see "Tech Talk" for technical details.) Exhaust ratio remains identical to that of a stock early Hemi. Rocker arms and stands are CNC-machined from 7075 T651 aluminum, then anodized.