Looking to add a little extra mid-range power to my 2001 DiscoII. I have looked at chips and still looking. I'm curious will the tube headers from the 4.6L fit the 4.0L and bolt up to the cats? I think the way to get more power from this engine is increase efficiency. I found a cat back kit from magnaflow I'm looking at. I was thinking if the 4.6L headers are a straight bolt on them wrap them in an insulating wrap and then work on some kind of better ignition?

Ideas, comments, smart remarks please.

-Will

 

I have the Magnaflow Catback exhaust...removed my resonator. I cant tell any more power really. It just sounds cool. Its a nice stainless muffler, you get used to the throatly sound.

 

Header will do little unless you let them breathe, in other words a bigger cam and reworked valves for better air flow.

 

Well considering that the 4.0 and 4.6 engine are the exact same block and heads there will be nothing gained by switching headers other than a lighter wallet.
Read the description's.

Exhaust Manifold - Right Hand | Exhaust Parts for Land Rovers & Range Rovers
Exhaust Manifold - Left Hand | Exhaust Parts for Land Rovers & Range Rovers
And the cats are the same too.
Land Rover Discovery II Catalytic Converter Y Pipe - Land Rover Catalytic Converter Parts at Roverparts.com

Other than rebuilding your engine there is nothing you can do to increase power.

 

Alright guys thanks for the input. I think all I'm going to do is wrap the exhaust manifolds with wrap and call it a day.

 

I wouldn't.

header wrap tends to hold in moisture and causes manifolds/headers to rust.

 

Why would you want to wrap your headers?
Whats the point?

 

Wrapping headers will cause other problems as mentioned. These trucks suck at 0-60 performance, but are great at offroading and snow. As I tell everyone, it wont get me anywhere fast, but it will always get me there.

 

0-60 in 3.2...gallons

 

Yes absolutely!
If you wrapped your headers wouldn't that lower the heat coming off them?? The only worry with that is rust... ....