The reason is that the new motor has a hemispherical combustion chamber. A HEMI HEAD. It flows alot of air and fuel.such a big jet my rubicon only uses a 158 hmf k&n and big 2'1/2 inch snorkel
QUOTE ("Rubicon3303":2a00lv4n)
The reason is that the new motor has a hemispherical combustion chamber. A HEMI HEAD. It flows alot of air and fuel.[/quote]such a big jet my rubicon only uses a 158 hmf k&n and big 2'1/2 inch snorkel