I saw that the XJ 4.0 Manual HO headers tend to crack at the #6 Cylinder. Was wondering fi anyone knew good aftermarket brands I could trust or a site in which to find customer reviews. I'm not new to cars, but this is the first time I am trying to fix stuff _before_ it breaks!! XD

 

http://www.ineedparts.com/auto-parts...-manifold.html

i think only thorley makes the long tubes for a 4.0 still.. mad $ though

 

Would long tubes be the best fit for a daily driver with no plans for wheeling? Improve or hurt gas mileage? Better or worse in initial 'get-up-n-go'?

 

Looking for Long tubes myself for the DD. Long tubes will bring the high end torque down into the mid power band, won't effect fuel economy negatively, and from what I've heard, will slightly increase torque across the power ban.

 

EBay- OBX tuner header longest I've seen. Aftermarket header can crack & break also. Things like worn motor mounts, missing hangers ect can put a lot of stress on a header. Factory headers are notorious for cracking.