Thread: P38 Centre muffler replace or bypass or bite the bullet?

I have a high flow straight through muffler and no rear resonator - sounds terrible - very droney - the sound with just the rear resonator removed and standard muffler is nice.

Edit - this is on a disco 3.9 but I imagine the setup is much the same

I've got a standard centre muffler and straight through at the rear. It barks under load, sounds great up in the revs, but is quiet on the hwy - no droning.

The replacement muffler I put on through want a baffle type like the original I took of though. It was a straight through pipe with large holes into the muffler filing.

I've always wondered what a larger diameter system would do though.

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A few years back I had both cats replaced with high flows after one of them developed an annoying rattle, at the same time I also had an aftermarket exhaust system fitted. I stuck with standard diameter, however the centre muffler is the high flow straight through variety as is the rear muffler. No noticeable improvement in performance or economy. But it certainly sounds like a V8, especially under acceleration. Because my old centre muffler had a few holes in it the cabin noise became far quieter with the new exhaust

Gary

I have done both, first I chopped off the rear resonator, and I liked the sound, but I had a problem with it on the highway with drone. Then I put it back on, and dropped the BIG centre stock muffler and put a sports muffler on, it was too quiet, back to stock, so I dropped it for a straight pipe and I love it now. Straight pipe in the centre and the stock resonator on the rear.

Originally Posted by glenhendry

I have done both, first I chopped off the rear resonator, and I liked the sound, but I had a problem with it on the highway with drone. Then I put it back on, and dropped the BIG centre stock muffler and put a sports muffler on, it was too quiet, back to stock, so I dropped it for a straight pipe and I love it now. Straight pipe in the centre and the stock resonator on the rear.

No highway drone?
Does one simply buy the pipe from a muffler supplier? What then, couple of slits with an angle grinder to allow clamp to compress plus some exhaust pipe goo to properly seal it? EDIT: or do you retain the flange arrangement?

Originally Posted by glenhendry

Straight pipe in the centre and the stock resonator on the rear.

Hrm. I'm sure I have a very large muffler at the back, not a resonator.

--Striker.

Originally Posted by Striker

Hrm. I'm sure I have a very large muffler at the back, not a resonator.

--Striker.

Hi Striker, the largish muffler slightly aft of the petrol tank tucked in under the RH side of the wheel well is what the chaps are referring to as the resonator.

Range Rover P38 Straight Through Exhaust Centre Section 4 0 OR 4 6 Stainless | eBay

Might have to buy me a welder, bit expensive for a piece of pipe