PowerCaps for Limefire


Sanderson PowerCaps for Limefire under chassis exhaust connection (sold as a pair)

Sanderson PowerCap Silver Ceramic
PowerCaps for Limefire $179.00$239.52
SKU: PWRCPS-LF Category: Tags: ,

Sanderson PowerCaps capture hidden horsepower on Lakes-style header applications when using an under-chassis exhaust connection.

Utilizing an under-chassis exhaust connector allows the installation of a quieter under-chassis exhaust system, and adding the PowerCaps increases power while extending lakes-style header life. PowerCaps reduce turbulence at the end of Limefire and Jayster lakes-style headers by improving the flow of exhaust gasses into the under-chassis exhaust system. The Sanderson PowerCaps adapters slide into the Sanderson Limefire or Jayster lakes style header and bolt directly to the block-off plate flange, offering a dramatic improvement in performance, reduction of exhaust gas temperatures, and enhanced exhaust tone.

NOTE: If the engine is making decent power, adding the PowerCaps option is recommended to prevent possible discoloration of the header coating on Limefire and Jayster headers. Please click on the “Why Use PowerCaps?” tab for more information.

Use PowerCaps to find extra horsepower that’s been lurking in the shadows of engines equipped with lakes-style headers!

  • For Limefire headers
  • Available in Silver Ceramic Coated finish, Black Satin Ceramic Coated finish, or raw metal (plain steel). Please select the correct option to match your header finish.
  • Sold as a set (pair)
  • Block-Off Plates are sold separately

TIP: Whatever block-off plate is used, the removable functionality allows bypassing the exhaust system in venues that allow open exhaust. Create your own block-off plate or use Sanderson’s “classic look” Finned Cast Aluminum Plates (#LFBP) for Limefire applications, or use a Sanderson Turnout Tip (#LFTO for Limefire, or #JAYTO for Jayster).

Additional information

Weight10 lbs
Dimensions12 × 6 × 6 in
Header Finish

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

Why Use PowerCaps?

Sanderson PowerCap displayFor 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.


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