SPE 6.7 PSD valve springs.
The SPE 6.7L PSD Beehive Springs provide heavyweight spring rates while maintaining the factory retainers. Sold as a set of 32. (Call for Specs)
Note: Stage II Springs will require the head to be machined.
The SPE 6.7L PSD Beehive Springs provide heavyweight spring rates while maintaining the factory retainers. Sold as a set of 32. (Call for Specs)
Note: Stage II Springs will require the head to be machined.