4G/5G Catalytic Converters & Downpipes

CARRisma · Post by **CARRisma** » Thu Apr 29, 2021 6:14 pm

Can anyone recommend me any specific replacement Prelude catalytic converters?

I have a 2000 Prelude 2.2VTi (H22A8) and there's a hole at the back of the cat, so making a loud noise. The original part number for the cat is 18160-P5P-G10 which has been discontinued. Not the end of the world seeing as the last list price was £998.18 (don't know if that's including or excluding VAT).

There are many alternatives on eBay for about £100 - £200. I see a brand called BM Catalysts and I get the impression they're not bad, so I'm considering this one:

https://www.cats2u.co.uk/honda/7149-hon ... 0784h.html

That one is "type approved" and costs £232.16. Due to the age of my car, I don't think I require a type approved cat, but I assume it would be beneficial at MOT time for emissions. The non-type approved version costs much less at £55.06.

I see Tegiwa selling many Magnaflow high flow sports cats but I'm worried they will make the car a lot noisier which is what I do not want.

nalla · Post by **nalla** » Thu Apr 29, 2021 7:14 pm

Best bet is a decat with a friendly local garage

nitin_s1 · Post by **nitin_s1** » Sun May 02, 2021 8:13 am

Honda dealers would be really expensive or discontinued, as you say.

And I know you want to keep it close to OEM as possible so I think best is to get one from someone who’s breaking their car? Someone with a low mileage or in a good condition.

Scott560 · Post by **Scott560** » Sun May 02, 2021 8:45 am

info on that site right at the bottom:

https://www.cats2u.co.uk/content/14-do- ... proved-cat

I used a cheap one a few years back, non type approved, passed emission fine.

Post by **Drax** » Sun May 02, 2021 9:50 pm

Scott560 wrote: ↑
Sun May 02, 2021 8:45 am
info on that site right at the bottom:

https://www.cats2u.co.uk/content/14-do- ... proved-cat

I used a cheap one a few years back, non type approved, passed emission fine.

great site! ill pop this thread in the Special Offers & Recommendations section

Anzezaf · Post by **Anzezaf** » Fri May 14, 2021 7:04 pm

BTW I went through the same ordeal in February 2021.

Bought a BM catalyst for my BB8 (BM BM90784), fitted it brand new, drove not even 100 miles to the MOT and failed emissions spectacularly.. CO levels were off-the-charts-bad

Eventually got a refund and I'll be using it to drive between MOTs. Gonna fit a working one for MOT of course.

EDIT: I passed emissions without problems before changing cat (the older one was rattling but catalytic-ing alright, I just wanted to get rid of the rattle

)