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Terre Rouge



Member Since: 11 Feb 2025
Location: Pezenas
Posts: 5

France 
Removing the Cat conv?
One of my Defs is a 2005 110 with 250k kms. My nearest remap specialist in Albi refuses to remap it due to the high kms. I’ve already removed the ERG, my question is…will removing the Cat Conv make it a little less of a tank to drive?
Merci
Post #1060398 12th Feb 2025 5:50pm
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4RF RDS



Member Since: 19 Jul 2015
Location: Ottawa
Posts: 959

Canada 2000 Defender 110 Td5 XS CSW Epsom Green
Anything allowing more free flowing exhaust will help. Thumbs Up 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

Every normal man must be tempted at times to spit on his hands, hoist the black flag, and begin to slit throats.
H. L. Mencken (1880 - 1956)
Post #1060400 12th Feb 2025 6:08pm
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achuakh



Member Since: 12 Apr 2012
Location: Singapore
Posts: 161

Singapore 2002 Defender 90 Td5 SW Oslo Blue
it makes the turbo spool up slightly faster.
it also gets rid of the issue of the passenger's feet feeling hot (assuming the steering wheel is on the right) on a long drive.
it also changes the smell of the exhaust.

you can also consider removing the mid box, but keep the smaller one at the end. it sounds nice. The defender has migrated, leaving the owner behind.
Post #1060838 18th Feb 2025 11:16am
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1144

France 2002 Defender 110 Td5 DCPU Chawton White
4RF RDS wrote:
Anything allowing more free flowing exhaust will help. Thumbs Up


I doubt CAT is much of an obstruction assuming not blocked, same with muffler etc. This would only create a small amount of HP gain at higher RPM when the engine is probably screaming already and will make no difference to normal driving and acceleration. My current Td5 has the cat and I recently drove the same year 110 with the CAT removed and there was no noticeable difference other than some turbo whistle.

The CT (MOT) in France is not too intelligent, compared to say the German TuV, but there is still the risk that emissions equipment is noticed as being absents.

Unless the cat is blocked I would keep it just fine.
Post #1060849 18th Feb 2025 12:45pm
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Jabberwocky



Member Since: 27 Oct 2021
Location: Luxembourg
Posts: 227

Luxembourg 
If there are concerns about failing an MOT, some companies do Cat shells, they look like a CAT but are empty inside. Or buy an early TD5 that don’t have CATs🤷‍♂️😁😁
Post #1061066 21st Feb 2025 8:59pm
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