Howards Valve Spring Set 98632; Max Effort Dual, 1.5 in. OD, 145 lbs @ 1.94 in.

Howards Valve Spring Set 98636; Max Effort Dual, 1.514 OD, 130 lbs @ 1.875 in.

Howards Valve Spring Set 98541; Max Effort Dual 180 lbs at 1.8 in. 1.5 in. OD

Howards Valve Spring Set 98443; Max Effort 145 lbs @ 1.880 in., Dual, 1.440 OD

Howards Valve Spring Set 98541; Max Effort 475 lbs/in Dual Spring 1.500" OD

Howards Valve Spring Set 98441; Max Effort Dual 175 lbs @ 1.750 in., 1.437 OD

Howards Valve Spring Set 98432; Max Effort 135 lbs @ 1.75 in., Dual, 1.437 OD

Howards Valve Spring Set 98442; Max Effort 145 lbs @ 1.75 in. Dual, 1.437 OD