Product Summary

Stainless w/ High-Temp Rubber Core Gasket Material

  • Header gaskets feature a triple layer design of stainless steel with a heat-resistant, rubber-based inner core
  • EXtreme header gaskets are 0.085" thick and ultra-pliable for great sealing on all surface types
  • EXtreme header gaskets are reusable thanks to their stainless steel outer layer and won't stick or flake off
  • The triple layer design combined with the thickness of the gasket conforms to surface irregularities to create a tight, leak-proof seal
  • Available in popular domestic V8 engine applications along with matching header collector gaskets
See more details

Key Specs

MFG. Part #91013530
BrandSpeedway Motors
Gasket MaterialStainless w/ High-Temp Rubber Core
Overall Thickness.085"
See more specs

Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91013530 Details

  • Reusable, triple layer stainless steel design with heat-resistant rubber inner core
  • EXtreme gaskets provide better sealing than standard exhaust gaskets
  • Suitable for high temperature use in performance engine applications
  • Ultra-pliable .085-inch thick gasket conforms to irregular surfaces
  • Direct fit for application with no trimming or modifications required
  • Ford Flathead V8 round exhaust port measures 1.90 inches in diameter
  • Seals imperfect header and cylinder head surfaces that paper gaskets can’t
  • Sold as a complete set of six header flange gaskets

A Reusable Exhaust Header Gasket That Resists Leaks and Blowout Failures

Exhaust header gaskets have a tough job. They need to keep your engine’s hot exhaust gasses inside the header as the exhaust passes from the cylinder head to the header and on through the exhaust system. The union between the cylinder head and the header is where the highest heat is found in the exhaust system, so the exhaust header gasket needs to be up to the task to keep those hot gasses inside where they belong. Most headers ship with one-time use paper exhaust header gaskets that do not do a particularly good job of sealing unless the cylinder head and header flanges are perfect (and they rarely are). Tricks like soaking the paper gaskets in water or adding globs of silicone gasket maker all around the ports are just band-aids. Whether you’re installing brand new headers, or you’re looking for a quality gasket to service a leak on your existing headers, our EXtreme triple layer gaskets are a great solution.

Three Layers of High Heat Resistant Material Provides Lasting Protection

Our EXtreme header gaskets feature two layers of perforated stainless steel gasket material sandwiching an inner core of high-temperature rubber-based gasket material, making for a long lasting exhaust header gasket that can be reused multiple times while sealing minor imperfections and surface irregularities. This allows header removal for engine or cylinder head service without having to worry about spending time scraping dried and burnt paper gasket material off your headers and/or cylinder heads. Once you’re ready to bolt your headers back up, simply wipe down the exhaust header gasket surfaces and slip them in place between the cylinder heads and your headers and torque your header bolts to spec. The .085-inch thick header gaskets remain pliable heat cycle after heat cycle to resist exhaust leaks and blow outs.

Available For Most Popular Cylinder Head Exhaust Port Flanges

The application for this part number is the Ford Flathead V8 with round port exhaust port/header flange specification and sold in pairs. If you’re in need of SBF header gaskets or you’re looking for a different application, including SBC header gaskets, BBC header gaskets, and others we offer our EXtreme header gaskets in many popular applications. We also offer matching EXtreme header collector gaskets as well to ensure your header seals properly both at the cylinder heads and at the collectors on your headers. Speedway Motors EXtreme exhaust header gaskets and header collector gaskets are some of the best header gasket options for the money.

Speedway Motors 91013530 Specifications

KEY SPECS
MFG. Part #91013530
BrandSpeedway Motors
Gasket MaterialStainless w/ High-Temp Rubber Core
Overall Thickness.085"
GENERAL
Material TypeGasket Material
Port StyleRound Port
Port Height1.90"
Port Width1.90"
Inside Diameter1.90"
Sold in QuantitySet
NotesSold as a set of six

Ratings & Reviews

4.9

11 Reviews

Overall Assessment

Customers appreciate our product for its perfect fit, ease of installation, and competitive pricing. The product stands out for its quality, adapting well to aftermarket modifications. Its thickness is admired as it ensures a perfect seal, thereby enhancing its performance. Users have employed it for various applications including model T Ford overhead conversion, emphasizing its versatility. The consensus is this product is exceptional and one they'd purchase again.

4.9

11 reviews

5

10

4

1

3

0

2

0

1

0

Filter by Ratings

Great A+

5.0

4 months ago

Teach

Minnesota

Verified

Great product as advertised!

Would Recommend

Great gaskets

5.0

a year ago

32 Motorsports

Thompson, CT

Verified

These gaskets worked perfectly for the headers on my flathead rebuild.

Would Recommend

Yes

4.0

a year ago

Robin

Ormond Beach , Fl

Verified

They worked out great on our AV8 project !

Would Recommend

Just what I needed

5.0

a year ago

Survivor

Idaho

Verified

Repaired a header leak on a 1948 flathead ford. Worked great.

Would Recommend

I would buy this product again

5.0

4 years ago

Tizzy

Ohio

Verified

Nice product fit nicely

Would Recommend

fit like a glove

5.0

6 years ago

nitro flathead

milton wi

Verified

went together just fine

Would Recommend

Perforce of this product is great

5.0

10 years ago

Oldtin

Vail, az

Verified

Fit very well good price

Would Recommend

Flathead gasket

5.0

10 years ago

Bent

British Columbia Canada

Verified

We asked that you specifically not use UPS to ship to us in Canada, The order was sent across the country twice then they wanted to charge crazy brokerage fees and it took 2 weeks to actually get the order. Use USPostal service, way better service for us Canadians

Would Recommend

Good fit

5.0

11 years ago

Trink

Green Bay, WI

Verified

fit the aftermarket headers nicely

Would Recommend

The gaskets are great. Good Job

5.0

11 years ago

1914ford

Pueblo, CO, USA

Verified

I needed the gaskets for a model t ford overhead conversion to a Frontnac head .

Would Recommend

Load More Reviews

Showing 10 of 11 reviews

Questions & Answers

1 Question • 1 Answer

Which exhaust gasket set would YOU use on a "mild-built" 1952 Mercury motor? As Fenton cast iron headers will be used, am I correct that I need outlet gasket set 91013605-3? Thank you.

by Ed

• 11 years ago

1 answer

1 of 1 questions shown

Fitment

  • 221 Ford Flathead V8

  • Ford Flathead V8 17 Stud 221 18

  • Ford Flathead V8 21 Stud 221 40

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 239 Ford Flathead V8

  • 221 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

  • 239 Ford Flathead V8

Customer Impersonation Script