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3 Lions

Member Since: 11 Jun 2011
Location: Geelong, Victoria
Posts: 44

Fitting a De-Cat pipe and straight through pipe. (TD5)

Hi, I know there is quite a few threads on fitting De cat pipes, but I have a query.

I have a late 2006 TD5 110, which has silicon hoses, the EGR has been removed and it has been chipped, remapped what everyou want to call it.

I am looking at changing the exhausts to Improve performance, but am worried about it being noisier, especially on the freeway doing 100/110Kms.

I was looking at putting a Terra firma De Cat pipe on, and am tossing up on a straight through pipe in the middle or one with a small silencer or small cherry bomb. Then leaving the tail section original.

Would I be better off with a straight through middle pipe or one with silencer/cherry bomb.

As I said I'd like to maximise performance but not at the expense of an annoyining drone at higher speeds for longer journeys.

Any advice is appreciated.

Regards, Col. 1979 Series 3 109 FFR (ex Aust Army.)
2006 Defender TD5 110.
2012 Trackabout CT.

17th Sep 2012 3:36pm

twopoint6khz

Member Since: 18 Aug 2011
Location: North Lakes
Posts: 654

Mine's the same (chipped late Td5) and I'm about to do exactly that to it (just ordered the bits), so I'll let you know.

I put a straight-through middle section on my old Td5 90 hardtop (which had no cat in the first place) and that made it pretty loud in the cabin. Hoping the longer length of the 110 plus the carpeting etc will deaden the noise a bit.

Worth it for the performance gain though, particularly on a chipped vehicle

17th Sep 2012 4:04pm

Defender-Stu

Member Since: 14 Jun 2012
Location: South West England
Posts: 1320

I have had a Td5 disco with de cat and middle section removed and left the std back box and that was loud but I went for the back box aswell and yeah did make a difference but I do love the Td5 roar and everyone I new loved it and was not bad on the motorway at 70 mph but I just turned the radio up lol

17th Sep 2012 4:11pm

rustandoil

Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 736

2005 Defender 110 Td5 XS DCPU Bonatti Grey

I am running a decat pipe and straight through centre pipe on my 110DC i still have the small silencer in the tailpie, it sounds fantastic and only a little noisier while on the motorway

17th Sep 2012 5:36pm

JWL

Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

You'll be travelling so much easier and faster that you'll.leave the noise behind

My 110 SW is running de-catted and centre box removed, whilst yes it is slightly louder a little more booming but it is far outweighed by the performance gained and the extra grin factor

17th Sep 2012 6:46pm

3 Lions

Member Since: 11 Jun 2011
Location: Geelong, Victoria
Posts: 44

So I take it Decat pipe and straight through middle pipe is the way to go? With standard tail pipe and box left?

Thanks for the Info and replies.

Col.

1979 Series 3 109 FFR (ex Aust Army.)
2006 Defender TD5 110.
2012 Trackabout CT.

17th Sep 2012 6:54pm

rustandoil

Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 736

Easily reversible where's the decision

17th Sep 2012 7:32pm

3 Lions

Member Since: 11 Jun 2011
Location: Geelong, Victoria
Posts: 44

eddie wrote:
Easily reversible where's the decision

Want to make sure before going ahead.

Cheap as chips in UK, but shipping to Aus not so.

A bit pricey for the same parts here, so don't want to buy them and fit them then take them off in a couple of months coz its driving the missus and kids mad.

Can hardly here the little ones as it is when they are in the back. (maybe thats not a bad thing!!)

Col. 1979 Series 3 109 FFR (ex Aust Army.)
2006 Defender TD5 110.
2012 Trackabout CT.

17th Sep 2012 7:38pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5842

1999 Defender 110 Td5 SW Caledonian Blue

It worked for me. No cat to worry about just removed mid box and replaced with a straight through pipe on the 110. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

17th Sep 2012 7:42pm

JWL

Member Since: 26 Oct 2011
Location: Hereford
Posts: 3443

@3 lions, have you priced up a pre-cat fitment pipe? As it was standard fitment before 2002 in the motherland you could allways tell her that's what you paid

This part is the fiddly bit to put on by yourself, taking the x-member off makes the job easy but the replacement/realignment of the x-member does require an odd tap with a hammer just to persuade it to line up

The middle box is easily done as you only have to touch the pipe.

17th Sep 2012 8:09pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5663

2006 Defender 110 Td5 USW Zermatt Silver

Sorry to disagree with everyone , but

I had fitted a decat front pipe and straight through mid pipe, run it for a year or so, but on long journeys it just booms (and I have full sound proof kit, and higher ratio trans box fitted). So fitted mid pipe from Alive that has the cherry box in it, and it is much better. All the nice sound, but no internal boom, still no exhaust restriction.

All this was done keeping standard rear exhaust section

Andy

17th Sep 2012 8:26pm

3 Lions

Member Since: 11 Jun 2011
Location: Geelong, Victoria
Posts: 44

landy andy wrote:
Sorry to disagree with everyone , but

I had fitted a decat front pipe and straight through mid pipe, run it for a year or so, but on long journeys it just booms (and I have full sound proof kit, and higher ratio trans box fitted). So fitted mid pipe from Alive that has the cherry box in it, and it is much better. All the nice sound, but no internal boom, still no exhaust restriction.

All this was done keeping standard rear exhaust section

Andy

Andy, was this on a 90 or a 110?

Col. 1979 Series 3 109 FFR (ex Aust Army.)
2006 Defender TD5 110.
2012 Trackabout CT.

17th Sep 2012 8:36pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5663

Hi Col.

It is a 90, and is very well sound proofed. Td5 is loverly sound but better without the internal boom, especially on the long runs.

Any other questions just ask

Andy

17th Sep 2012 8:44pm

3 Lions

Member Since: 11 Jun 2011
Location: Geelong, Victoria
Posts: 44

JWL wrote:
@3 lions, have you priced up a pre-cat fitment pipe? As it was standard fitment before 2002 in the motherland you could allways tell her that's what you paid This part is the fiddly bit to put on by yourself, taking the x-member off makes the job easy but the replacement/realignment of the x-member does require an odd tap with a hammer just to persuade it to line up The middle box is easily done as you only have to touch the pipe.

Was planning on fitting it myself, Only goto Mechanics these days if I can't do something.

Col. 1979 Series 3 109 FFR (ex Aust Army.)
2006 Defender TD5 110.
2012 Trackabout CT.

17th Sep 2012 8:52pm

twopoint6khz

Member Since: 18 Aug 2011
Location: North Lakes
Posts: 654

As above, 90s are known to be loud but 110s I believe are different - hence Alive don't normally make a midpipe for 110s with a cherry bomb in, cos they don't need it.

17th Sep 2012 9:05pm

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