86customanche Posted February 15, 2013 Share Posted February 15, 2013 So my exhaust manifold has a crack in it, one of the reasons I failed inspection. I have a couple of options and would like yalls opinion on them. The first is to clean off what I got, weld the crack together, and throw her back in there and see how long itll last before another crack appears. The second would be to buy an oem replacement header that should last a very long time. And the third option is to buy a aftermarket header thatll boost performance a little. The last option is my favorite, but obviously is the most expensive. :hmm: I'm stumped. Oh and I have the HO 4.0 in my 92. Link to comment Share on other sites More sharing options...
flint54 Posted February 16, 2013 Share Posted February 16, 2013 Just one opinion, I suggest that springing for an aftermarket header hoping for a performance boost may not be cost effective. Unless you are doing so with some other things to improve overall flow rate (like larger diameter system, like port matching between head and header, like flow improvements to the head), the gain could be very small and mostly at high rpm. Unless you're going to really open the checkbook to buy some more performance, I would just swap in another OEM unit (but I have zero welding skill). Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 16, 2013 Share Posted February 16, 2013 :agree: A header won't do much on your non-aspirated engine except lighten your wallet and may cause exhaust fitment issues as well. Just replace or repair your stock exhaust manifold. Link to comment Share on other sites More sharing options...
cruiser54 Posted February 16, 2013 Share Posted February 16, 2013 So my exhaust manifold has a crack in it, one of the reasons I failed inspection. I have a couple of options and would like yalls opinion on them. The first is to clean off what I got, weld the crack together, and throw her back in there and see how long itll last before another crack appears. The second would be to buy an oem replacement header that should last a very long time. And the third option is to buy a aftermarket header thatll boost performance a little. The last option is my favorite, but obviously is the most expensive. :hmm: I'm stumped. Oh and I have the HO 4.0 in my 92. Weld it properly, after drilling a small hole at each end of the crack. Reinstall it and add a flex joint to the systemwhere the exhaust system crosses over from the left to right side of the truck. Make darn sure your motor mounts are good as well as your trans mount. Link to comment Share on other sites More sharing options...
86customanche Posted February 17, 2013 Author Share Posted February 17, 2013 Thanks for the input. I bought a oem replacemnt and its on the way. Should be in by next weekend for install. Link to comment Share on other sites More sharing options...
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