SP-TC for Twin Cam Engines

Increased Oil Pressure

This Harley Twin Cam Oil Pressure relief valve spring kit from E.R.T. Products is designed to increase oil pressure on all 1999 and up Twin Cam engines. Increase your Harley Twin Cam Oil Pressure and performance by replacing the stock oil pressure relief spring in the oil pressure relief (bypass) valve of the cam support plate. Having proper oil pressure maintains the camshaft profile and quiets the engine. This means your valves will fully open (lift) and the time they are open (duration) will be correct. By using the SP-TC, your Twin Cam performance is increased, the engine is quieter and oil temp. is dropped by an average of 20 degrees. A simple solution that is guaranteed to work!!!!

Three Springs instead of One

One spring is not right for every engine, that is why our SP-TC kits contain 3 color coded springs. Each spring was specifically designed to enable you to adjust your oil pressure depending on your needs. Our SP-TC for Twin Cam engines has a more consistent spring rate than the stock Harley, Fueling or Baisley oil pressure relief spring!  SP-TC "Superpump"  springs are made of the finest spring steel known, in America, with the same material that is used in Indy car valve springs.  (Replaces and upgrades the following oil pressure relief springs: Harley part # 26210-99, Fueling part # 8002 & Baisley part # LMR-002) )

TC-EZ Installation Tool

This tool easily compresses the SuperPump SP-TC oil pressure relief spring to install the split pin. Being made of Delrin,  which is softer than aluminum, the TC-EZ will NOT  scrape or gouge the oil pressure relief valve bore. By using the TC-EZ, installation of the oil pressure relief spring without removing the cam plate is EZ! (Replaces and upgrades Fueling part # 9000)

SP-TC Spring Selection

If you are running 20 p.s.i. & up......... use. the "Blue" spring.

If you are running 10 - 20 p.s.i..............use the "Yellow" spring.

If running less than 10 p.s.i. ..................use the "Red" spring.  

ALL Measurements should be taken with a warm engine @ 2000 R.P.M. & up!  

Extremely Important

Make sure the pressure relief valve moves freely in the pressure relief bore!! If not, remove it from the bore and polish the plunger with fine emery paper until it does move freely!!! 

E.R.T. Products for Twin Cam Engines

SP-TC Superpump-Kit

Harley Twin Cam oil pressure relief valve spring kit

Comes with three color coded springs and three split pins. 

All Twin Cam engines. Also works with Screaming Eagle oil pump-cam support plate combinations and aftermarket cam plates. 

Free U.S.A. Shipping

SP-TC Pro-Pack

Includes the TC-EZ Installation tool. All Twin Cam 88", 96", 103", 110" engines. Also works with Screaming Eagle oil pump-cam support plate combinations and aftermarket cam plates.

Free U.S.A. Shipping

SP-TC Monster Pack

Harley Twin Cam oil pressure relief valve spring kit.

Includes the SP-TC Superpump-Kit, the TC-EZ Installation tool, 4 exhaust gaskets & 2 Cam cover gaskets.

All Twin Cam engines.

Free U.S.A. Shipping

Install the SP-TC Spring Kit


Stock split pin, pressure relief spring & plunger.


With new SP-TC spring from kit. Start new split pin.


New spring using the TC-EZ  tool. Tap new split pin in - flush with outer body of the cam support plate.