The Diamond Eye Performance turbo-back exhaust kit is a complete exhaust path upgrade intended for specific diesel pickup applications; the source lists a 4-inch turbo-back kit for 1994–1997 7.3L Ford F-250/F-350 PowerStroke models. This kit description indicates a full turbo-back routing sized for that engine and model-year combination where a CARB-equivalent configuration is noted in the listing.
Diamond Eye KIT 4in TB SGL AL 94-97 7 3L F250/F350 PWRSTROKE NFS W CARB EQIV STDS W PYR PLUG