Blox Racing Exhaust Stud

Blox Racing Exhaust Studs: Precision Fasteners Built for the Heat

When it comes to keeping an exhaust manifold securely fastened under the punishing temperatures of a performance engine, the quality of the stud matters far more than most enthusiasts realize. Blox Racing has been engineering import-focused performance hardware since 2003, and their exhaust stud lineup is a direct reflection of that commitment to precision, durability, and proper fitment.

Two Material Tiers: Stainless Steel and Titanium

Blox Racing approaches the exhaust stud category with two distinct material options, each suited to different build goals and budgets.

• SUS303 Stainless Steel: The foundation of the Blox exhaust stud range. These studs are CNC-machined from SUS303 stainless steel, delivering excellent resistance to the extreme heat, wear, and corrosion that exhaust manifolds generate. The stainless construction directly addresses one of the most frustrating problems in exhaust work — corroded or snapped OEM studs that turn a simple gasket replacement into an expensive cylinder head repair.
• XTREME Ti 6Al-4V Titanium: For builds where weight reduction and maximum heat resistance are priorities, Blox offers their XTREME series studs machined from aerospace-grade Ti 6Al-4V titanium. Available in both raw and burnt anodized finishes, these represent the top tier of Blox's fastener lineup.

Engineering Details That Matter

Across both material variants, Blox Racing exhaust studs share a consistent specification set that speaks to their quality. Each stud features precision-cut threads and ships as a complete hardware kit — including a 3mm-thick washer and a 12-point hex flange nut — so installers have everything needed for a proper, torque-reliable fitment right out of the box. The 3mm Allen socket drive on the stud itself makes installation and removal straightforward even in tight engine bay spaces.

Thread pitch and length options are carefully matched to real-world import engine applications. The M8x1.25 studs are available in 45mm, 55mm, and 65mm lengths, covering factory header fitment, aftermarket intake manifolds using thermal gaskets, and custom applications where additional thread engagement is needed. Blox also offers M10x1.25 studs at 55mm for larger-displacement applications including Honda 1.5T and 2.0T engines, K-Series setups, Toyota and Lexus inline engines, and Mitsubishi Evo turbo connections.

Popular Applications

Blox Racing has built their exhaust stud kits around the Honda and Acura platforms they know best. Kits are available in 7-, 8-, 9-, and 10-piece counts to match specific engine configurations — from the Honda S2000's F20C/F22C to the ubiquitous B/D/H-series family and K-Series engines with or without coolant flanges. This application-specific approach means less guesswork for the builder and a correct, rattle-free result.

Why Upgrade from OEM Studs?

Factory exhaust manifold studs are frequently made from materials that corrode and seize in the head over time, especially on vehicles that see track use, forced induction, or simply accumulate years of heat cycling. Blox Racing's stainless and titanium studs stop corrosion and rust-out problems, preventing the costly cylinder repair work that broken studs can cause, and allowing easy future removal of exhaust manifolds for gasket replacement or inspection. For any serious import build, swapping to quality aftermarket studs during a manifold install is simply good preventive maintenance.

Blox Racing's manufacturing partners hold ISO 9001 certification, and their processes are held to standards that meet or exceed OEM requirements — assurance that these small but critical fasteners will perform reliably lap after lap or mile after mile.