PLM Titanium K-Series Header Manifold Stud Kit K-Series K20 K24PLM Titanium K Series Header Manifold Stud Kit K Series K20 K24 Also fits K20C1 FK8 FL5 turbo & downpipe Complete set of 5 titanium studs, nuts, and washers. Give your vehicle the attention to detail it deserves with these exhaust manifold titanium fasteners. Leave behind all your rust and corrosion issues FOREVER! Never again deal with a manifold that is hung up on a broken or rusted in place stud. Fitment: K Series engines with 4 port cylinder heads