BLOX Racing intake and exhaust studs are CNC-machined from SUS303 stainless steel. Each stud features precision threads and includes a washer and 12-point hex nut.

The stainless steel material provides excellent durability and protection from extreme heat and wear. BLOX Racing stainless steel intake and exhaust manifold studs stop corrosion and rust-out problems, prevent expensive cylinder repair costs caused by broken studs and allow easy removal of intake or exhaust manifolds for gasket replacement or inspection.

BLOX Racing offers common lengths of 45mm and 55mm and extended length of 65mm for serious, custom requirements. Available in single-piece or multiple quantity sets.

Use with BLOX Racing Power Intake Manifolds, Thermal Shield Intake Gaskets; B-series Hi-Flo or Max-Flo headers; B or H-series T304 turbo manifolds.

1-piece: $5.50
7-piece: $38.50
8-piece: $44.00
9-piece: $49.50
10-piece: $55.00

Thread pitch: M8x1.25
Lengths: 45mm, 55mm, 65mm
Material: SUS303 stainless steel
Nut: 12-point hex flange nut
Stud: 3mm allen socket
Washer: 3mm thickness



BLOX Racing’s 2.5″ exhaust donuts are back-in-stock and shipping.

BLOX Racing also offers exhaust donuts specifically for Subaru, including a wide array of other DIY products. The Performance DIY line is perfect for building and assembling your own high performance component. Experienced fabricators and performance hobbyists, alike, now can have access to the same high quality components that top manufacturers use when making their own products. Choose from various components that allow you to build your own exhaust header, turbocharger kit or performance exhaust system.

With BLOX Racing Performance DIY products, the only thing holding you back is your imagination.


BLOX Racing Ti exhaust headers are made using Grade 1 titanium. Grade 1 is the purest blox-headers-4form available commercially and is the perfect choice for high end motorsports and racing products.

In general, titanium headers are available in Hi-Flo and Max-Flo (2-pc, 4-2-2-1 Tri-Y) for B-series engines and a K-Swap (2-pc, 4-2-1 Tri-Y) application for K-series engines in EG, EK and DC chassis. Each Ti header is handmade and hand TIG-welded; features stepped tubing; laser-cut flanges measuring 8mm (at cylinder head and at collector). Wall thickness measures 1mm. BLOX Racing matches cylinders 1&3, 2&4 together.

BXEX-00500-TI, Hi-Flo: 42mm – 45mm – 51mm; 6.20lbs
BXEX-00501-TI, Max-Flo: 45mm – 50mm – 55mm; 6.50lbs
BXEX-00510-TI, K-Swap: 49mm – 51mm – 56mm; 6.45lbs

For more product details and pricing, please visit our Exhaust Header product section on our website.