I'm replacing valve springs when the weather breaks. 98 camaro LS1 with an ms4 cam. Springs have changed since I last installed them, I have Texas speed dual .650s. Who to go with? Back to Texas speed .660 or Brian Tooley .660? One better than other?

 

BTR platinums if on a budget...Or PAC 1204x if you don't mind spending a little more coin. PAC RPM 1200 series are top of the line.

 

Another good option would be the Lunati duals.

 

Thanks, I'll look into those. No real budget, I'll pay for something worth it. Just want a quality dual that plays well with the ms4.

 

The BTR Platinum .660's are a quality spring and will last. If I remember correctly the new TSP .660 springs are made by PAC, which we all know is a quality spring as well.