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basically, performance difference is too small to notice so you are best making your decision on looks, price deal, and which brand you choose to support
there's only so much to say and its already been said repeatedly for years since the C&L (4.0L version) was made available.
- TOP SHELF quality in materials and workmanship.
- Ranks among the highest in performance gains.
- Looks large and aggressive under the hood.
- C&L offers an insert so that you can run a C&L on factory tune.*
* Might have to contact C&L to check if they still offer this insert. This piece can be useful for smog checks without having to swap entire air intake systems.
I had the JLT. Didn't look that great under the hood though but it did it's job. Reason I switched to the CnL is because I bought it new for little less than the price of a new JLT. Thing looks massive!