Ferrea is pleased to offer their Pro-Series Titanium Retainers including sizes that fit both traditional Domestic springs and Sport Compact springs. Precision CNC-machined from aerospace quality...

The new Ferrea Valve Springs are processed with premium-grade alloy and feature special thermal treatment. Ferrea's advanced spring design and material specs have uniform load and stress distribution...

Ferrea Valve Springs are the top of the line when it comes to valve train. We use them in our cars and suggest them to our customers. They are only to be used with Ferrea Retainers.Ferrea Retainers...

Supertech Spring / Retainer kits are precision matched sets for a complete valvetrain overhaul. Developed for the performance enthusiast that wants the best the industry has to offer, Supertech...

Supertech Spring / Retainer kits are precision matched sets for a complete valvetrain overhaul. Developed for the performance enthusiast that wants the best the industry has to offer, Supertech...

“BRUTE STRENGTH” DIFFERENTIALThe Strongest Clutch-Type Traction Differential Available! Legal for all drag race associations The thicker, webbed flange on the reinforced case reduces ring gear...