Chrome Steel Hex Head Header Reducer Bolt Set

• Hex head bolts secure header collector flange & reducer connections

• Standard wrench fit speeds installation compared to specialty-head bolts

• Fits 3/8"-16 collector flange bolt patterns on most header brands

• 8-piece chrome steel set resists corrosion at the collector

Secure your exhaust header collector or reducer connections with this 8-piece set of chrome steel hex head bolts, sized to fit 3/8"-16 collector flange bolt patterns used across most header brands. Hex heads accept a standard wrench or socket, making these easy to install without specialty tools.

These bolts are built specifically for collector flange and reducer connections — not for head-to-block or header-to-manifold-flange mounting, which use different bolt patterns and lengths. Finished in polished chrome for a clean look at the collector.

Always verify your header's collector flange bolt-hole spacing and thread size before ordering, since spacing and thread requirements can vary between header brands.

Applications
Fits any header or exhaust system using a 3/8"-16 collector flange bolt pattern. Intended specifically for collector flange and reducer connections — not for head-to-block or header-to-manifold-flange bolts, which require different hardware.

Installation
Confirm your header's collector flange bolt-hole spacing and thread size match this kit before ordering — collector flange patterns vary by header brand, so don't assume universal fit without checking your specific header first.

What's the difference between this kit and your other header bolt sets?
This kit is specifically for header collector flange and reducer connections, rather than the bolts used to attach the header flange to the cylinder head.

Will this fit any header brand?
It fits headers using compatible 3/8"-16 collector hardware, but collector designs and bolt-hole spacing can vary by manufacturer. Verify your header's requirements before ordering.

What tool do I need to install these bolts?
A standard wrench or socket — these use an external hex head rather than an Allen/socket-head design.

Can I use these bolts to attach the header to the cylinder head?
No. These bolts are sized for collector flange and reducer connections. Header-to-cylinder-head applications typically require different bolt lengths, so use the appropriate header bolt set for that connection.

Why is the thread length different from your other header bolt kits (1" vs. 3/4")?
Collector flange and reducer connections typically require a longer bolt to pass through the mating flanges, which is why this kit uses a 1" length compared with the 3/4" bolts used in TSP's header-to-cylinder-head sets.

Will the chrome finish hold up to heat near the collector?
The chrome finish is applied over steel construction. Some discoloration may occur from prolonged exhaust heat exposure over time without affecting the bolt's function.

Can I use this kit to replace missing collector bolts?
Yes — provided your collector uses the same 3/8"-16 thread size and requires a 1" bolt length. Verify your collector configuration before ordering.