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#21
Performance Related / Re: Best sounding exhaust
Last post by Hawko - December 3, 2025, 10:52
I have just gone for it and bought the Gravity one from Ebay.  It's now down to below £200 as there is an extra 10% off.  It's sold by MP Performance, when I messaged them they it was their own exhaust, but they have the same company VAT reg no as Gravity and it looks identical?
#22
Maintenance, Problems & Troubleshooting / Re: MOT Fail - Emissions
Last post by Gaz mr-s - December 3, 2025, 09:55
This might not be practical, but a product like Cataclean can make a significant improvement.  My partner's car has a 200 cell cat which has been on for several years. Her car failed & the testing station said 'new cat', - they didn't venture a cat-cleaner.  Cataclean sorted it, - passed easily.  You want to run the engine hard when you add it.

Change the subframe, make an MOT appt' & drive the car some miles before it.



 
#23
Maintenance, Problems & Troubleshooting / Re: MOT Fail - Emissions
Last post by Carolyn - December 3, 2025, 09:49
These work well:

https://www.cats2u.co.uk/3267-18
#24
Maintenance, Problems & Troubleshooting / MOT Fail - Emissions
Last post by valguss2001 - December 3, 2025, 09:16
Hi Guys

My frog failed it's MOT yesterday on Emissions and also a rotting rear subframe. Subframe I think I'm OK on and will be calling TCB for pricing in the new year.
For the Emissions, the garage said that the catalyst has failed and it looks like it's newer than the header, so might be an aftermarket smaller one. Earlier this year, I also knocked out the pre-cats.

My question is, should replacing the catalytic converter sort this and does anyone have any recommendations for a new cat?

Cheers

Tom

#25
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by Gaz mr-s - December 1, 2025, 19:46
Quote from: Joesson on December  1, 2025, 15:50
Quote from: benlumley on December  1, 2025, 15:19From what I've read on here a 2zz engine in a Mk 3 Roadster is like Marmite, certainly not for the "retiring", but if

Kevin, Zero owner.....
#26
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by Joesson - December 1, 2025, 15:50
Quote from: benlumley on December  1, 2025, 15:19Retiring end of next year. I ordered a 2zz one a few weeks back and spoke to him.



From what I've read on here a 2zz engine in a Mk 3 Roadster is like Marmite, certainly not for the "retiring", but if that is what you are planning for
I can't  fault your preparation.
#27
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by benlumley - December 1, 2025, 15:19
Quote from: Gaz mr-s on November 29, 2025, 21:38There are cheaper inferior ones than yours.  The majority aren't machined to use crush gaskets.

It's not the best in the UK though, that's a company called Zero exhausts, but he's reportedly going to be retiring soon.

Retiring end of next year. I ordered a 2zz one a few weeks back and spoke to him.
#28
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by Gaz mr-s - November 30, 2025, 14:56
Quote from: robinl on November 30, 2025, 12:58Does the gravity one have the lower bracket attachments?

The crush-ring fit flange of yours is a far bigger advantage.

Very few do have the brackets.


#29
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by robinl - November 30, 2025, 12:58
Does the gravity one have the lower bracket attachments?
#30
Maintenance, Problems & Troubleshooting / Re: New Exhaust manifold fitme...
Last post by Iain - November 30, 2025, 09:40
Ive been running a 'gravity' one for a few years now and had no issues. Doesnt have brackets for the heat sheilds though but some exhaust wrap cures alot of that problem.
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