Will the high flow headers from a p38 replace my exhaust manifold from my 1998 discovery 1. I am replacing my exhaust system and found these at a great price.

 

Pretty sure they wont fit between the frame rails.

 

Thank you I just looking for any performance upgrade to make my rover a monster. I was gonna add this onto a dual exhaust system. Guess that's out the window

 

Look into hedman headers. I think Toddco sells some too

 

try these guys.
D&D Fabrications: Engineering & Fabrication Services
direct to headers page: Headers, Header Kits w/Gasket & Header Flange Kit

 

Just remember that if you're looking for increased performance, everything has to match, if you increase the flow of the exhaust you need to increase the flow of the intake to match. I've seen some (and done some) dyno tests where adding only one side of the equation (like headers) actually decreases the performance. Oh no, that means I can't believe all the ads about how much horsepower "fill in the blank" will give me. That can't be true because the guy trying to sell it to me said it would.