[jeepgclwj]

Originally Posted by dksob81

wow the HP gain difference between the 4.0L and the 5.2: are huge.
K&N Website.

5.2L
57-1506-2 Product Specifications
Product Style: 57 Series FIPK
Estimated Horsepower Gain: 25.77 HP @ 4335 RPM
Type: Gen II
Replacement Filter: RF-1027
CARB Exempt: Yes
Weight: 11.1 lb (5 kg)
Product Box Length: 36.25 in (921 mm)
Product Box Width: 13.25 in (337 mm)
Product Box Height: 10.38 in (264 mm)

4.0L
Product Style: 57 Series FIPK
Estimated Horsepower Gain: 7.72 HP @ 4684 RPM
Type: Gen II
Replacement Filter: RC-4690
CARB Exempt: Yes
Weight: 10.4 lb (4.7 kg)
Product Box Length: 19 in (483 mm)
Product Box Width: 18.25 in (464 mm)
Product Box Height: 12.5 in (318 mm)

No way your going to get 25 hp from a K&N Gen II FIPK. I am pretty sure with my FIPK and Kolak exhaust I lost power but it sounds alot better. I couldnt even get my Jeep to stock times in the 1320. Sell your Jeep and nbuy somehting that wants to go fast and not a slow ass Jeep.....