SpeedFactory B/D/F/H Series Titanium Intake/Exhaust Manifold Nuts

SpeedFactory Titanium 6pt Nuts M8x1.25 10 Pack

Anyone who's fought a rust-welded exhaust manifold nut on a B-series knows why titanium hardware exists. These SpeedFactory titanium 6pt nuts are the M8x1.25 thread that lives on Honda intake and exhaust manifold studs, and they will still spin off clean after years of heat cycles that would seize a steel nut to the stud for good.

What It Is and Why It Works

This is a 10 pack of M8 x 1.25mm nuts machined from Ti-6AL-4V, the grade 5 titanium alloy SpeedFactory uses across its hardware line. Titanium runs about 45 percent lighter than comparable steel and does not rust, which matters most on exhaust side hardware where corrosion is what actually kills fasteners, not load.

The 6pt head is the reason to pick this pack over SpeedFactory's 12pt nuts. These carry a 12mm hex head that takes a standard 12mm socket or open-end wrench, so you get full flat engagement in spots where a 12-point socket wants to slip or where you can only swing a wrench a few degrees at a time. The 12pt version has a smaller 10mm head and looks lower profile, but on the back of a turbo manifold or under a header flange, the 6pt is the one you can actually get a tool on. That access is the whole buying decision between the two.

These pair with SpeedFactory's M8 titanium manifold studs, which cover B16, B18, B20, D15, D16, H22, H23, F20B, and F20C/F22C applications, and they work on any M8x1.25 stud or bolt where you want hardware that survives heat.

Specs

Available Options

Both finishes are the same Ti-6AL-4V nut. Burnt is heat colored for the blue and gold look, raw is bare titanium. Pick on appearance, not performance.

What to Know Before You Buy

This pack is nuts only. No studs, no washers. If you're doing a full manifold hardware refresh, SpeedFactory sells complete stud, nut, and washer kits in 45mm, 55mm, and 65mm stud lengths, and starting there is usually the smarter buy than piecing it together. Grab this nut-only pack when you're replacing lost or damaged nuts on studs you already run, or mixing 6pt nuts into tight spots on an otherwise 12pt setup.

Use anti-seize on the threads every time. Titanium galls against titanium and against steel under dry assembly, and a galled M8 nut can seize halfway on and take the stud with it. A dab of nickel or copper anti-seize on install is the difference between hardware that comes apart forever and a one-time-use nut. Torque to your manifold spec and don't lean on them; M8 titanium doesn't need gorilla torque to hold.

These are universal M8x1.25 hardware, so they aren't limited to Honda manifolds. Valve covers, brackets, anywhere an M8 stud lives and you want hardware that still looks good and breaks loose clean two years later.