The 40Ah is the largest H6 for our cars. We usually run the 30.
H6-24-RS: 24Ah, 1000CCA, 9.5lbs
H6-30-RS: 30Ah, 1200CCA, 12.5lbs
H6-40-RS: 40Ah, 1500CCA, 16.5lbs
You can find the pricing on our site:
This RS-30 has been replaced by a new version:
Select the 30Ah version, or whichever one you are interested in.