Su Dashpot Spring, HS/H/HD (Also HIF4/6) Light Blue 2.5 Oz @ 2.625" (Lightest Available). We Find Damper Springs Are Most Effective At Fine Tuning Cruise Mixture. They May Make A Very Small Change At Idle, And Virtually Nothing At F/THROTT
Since 1996 the APT website has been a popular destination for British sports car enthusiasts. British Leyland (BMC) 'A' & 'B' Series, all Triumph Engines "We wrote the book on Tuning the A-Series Engine" Authored by well known engine expert David Vizard and original partner in APT. APT specializes in engine and engine parts, and most importantly over 30 years of running them on the road, the track, the dyno and the flowbench.