Sanderson Headers Jayster392 Hemi Engines

The Jayster392 The Jayster header is named after Sanderson header designer and custom fabricator Jay Wangerine. The Jayster offers a whole new take on the classic lakes-style outside chassis header. The unique four-into-one design offers an eye-catching addition to any roadster or highboy.

IMPORTANT:

• The Jayster is available for all popular classic Hemi engine applications.
• Jayster392, Jayster426, Jayster345, and Jayster241
• Please select the correct Hemi engine group when ordering!

ORDER NOTES:

• Turnout Tip, Finned Block Off Plate, and other adapters are sold separately
• On engines making decent horsepower or vehicles doing considerable highway driving, adding PowerCaps to the Jayster is recommended! Please review the “Why use PowerCaps?” tab for additional information.
• Available with or without the under-chassis exhaust connection
• Dimensions provided are for standard (typical) applications. For wider frames/bodies, such as 40’s pickups, please CALL US for assistance. We can adjust the dimensions to fit virtually any chassis/body width (extra charges may apply).

NOTE: The provided images are from various Jayster engine applications. The design for Hemi engine applications is similar.

SPECIFICATIONS:

Engine: Chrysler/Imperial (331-392) Chrysler 426; Dodge (241-325); DeSoto (276-345) Hemi V8

Primary Tube Diameter: 1 7/8″

Collector Diameter: 3 1/2"

FEATURES:

• 16-Gauge Primary and Collector Tube Thickness
• 3/8″ Thick Flange
• Patented Flange Design Requires NO Gaskets
• Tightest Fitting Header Available Anywhere!
• Made in the USA

INCLUDES:

• Header Bolt Set (to the engine)
• Standard block off plate

FINISH:

Our Ceramic Coating is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, We apply a multi-layer inside and outside aluminized ceramic coating in-house and then polish the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases and increases the longevity of your header investment.

WHY USE POWERCAPS?

For those looking at the Sanderson Lakes-style Limefire and Jayster outside chassis headers for their street rod, here is a tech tip that might save some grief, frustration, and possible damage to the headers!

You may already know that the Sanderson lakes-style headers are available with or without connections for an under-chassis exhaust system. The ability to have a throaty open exhaust or a quiet and capped lakes-style header using an under-chassis system has been something Sanderson has offered since the original design.

We have found that on stock or mild street rod engines, there is not much of an issue if following the normal installation instructions. However, on applications making decent horsepower, it is possible to damage the header or header coating near the end of the collector where the under-chassis adapter connection is located. The cause of this problem is the turbulence created by the limited distance of dead space just after the under-chassis connection and the end cap on the header (when the header is capped and exhaust gasses are being routed through an under-chassis exhaust system). The turbulence in this area causes the EGT’s (Exhaust Gas Temperatures) to rise dramatically, and in certain applications, this could cause the temperatures to exceed the thermal capacity of the header coating—causing finish damage and discoloration. The problem only seems to occur on high-power engines and engines that are regularly operating at higher RPMs—for example, considerable highway driving on lower-geared vehicles.

The solution is relatively simple but adds cost to the header purchase. Sanderson designed a component called the “PowerCap” to solve this issue. The PowerCap slides into the collector tube and provides a smooth redirection of exhaust gas flow from the collector tube into the under-chassis exhaust tubing. The PowerCap bolts securely into your header using the end cap flange, thereby removing the turbulence area in the collector horn. Another benefit of using the PowerCaps is improved horsepower by improving airflow into the under-chassis exhaust. Although the PowerCaps are recommended for higher horsepower applications, they also benefit all applications using the under-chassis exhaust connection.

PowerCaps capture hidden horsepower on applications using under-chassis exhaust connections. Under-chassis adapters allow you to run a quieter under-chassis exhaust system, and adding the PowerCaps increases power and extends the life of your headers.

ADDITIONAL INFORMATION:

Weight 50 lbs

Dimensions 36 × 22 × 7 in

Header Finish Silver Ceramic Coated, Black Satin Ceramic Coated, Plain Steel (raw metal)

Hemi Engine Group

Chrysler / Imperial 331, 354, 392, Dodge 241, 270, 315, 325, DeSoto 276, 291, 330, 345, Chrysler 426

WARRANTY:

Limited 5-Year Warranty

Sanderson Street Rod Headers strives to supply our customers with the highest quality parts and services available in the street rod industry. In keeping with this, we warrant and will repair or replace, at our option after an inspection in our facility, any of our products that are found by us to have failed due to defects in either material or workmanship. This warranty is activated by the return of the Warranty Card enclosed with every pair of headers and is effective for FIVE YEARS * from the date of purchase as indicated on the original invoice.

This Warranty does not cover products that fail due to improper motor tuning, alteration, disassembly, or damage caused by racing, misuse, neglect, abuse, improper installation, and/or accident, or when used on applications for which they were not designed or approved. We are specifically not responsible for the costs of removal, installation, transportation, destruction of other components, inconvenience, loss of time, or other personal damages, or for any other associated costs including the application of aftermarket coatings applied by others. Sanderson Street Rod Headers shall not be liable for any and all consequential damages occasioned by the breach of any written or implied warranty pertaining to this sale in excess of the purchase price of the product(s) as found on the original invoice.

INSTALLATION NOTES:

1. The Patented Leak-Free Design on Sanderson Headers provides the only leak-free flange design on the market … Do Not Attempt To Use Flange Gaskets! The raised flange on tube-style Sanderson Headers will buckle the gasket during tightening and actually cause a leak! It is only OK to use a header gasket on the cast-series header sets (QP1000 and QP2000).
2. Sanderson Headers are NOT emissions legal on pollution-controlled motor vehicles. It is the purchaser’s responsibility to verify local regulations for compliance.
3. Wrapping your Sanderson Headers with ANY thermal tape voids your header warranty. The best thermal protection for your headers is our Aluminized Ceramic Coating which is available for every Sanderson Header.