Stainless Steel Exhaust Manifold 4-1 MX5 Mk3/3.5/3.75 Reviews

4.8 Rating 13 Reviews

I.L.Motorsport has launched a brand new line of Stainless steel headers. This is a fully stainless header with 4 into 1 pipes is designed so that it delivers maximum HP and a maximum high flow. They have tested numerous designs to get to this special looking finished header. This price for this header is only available as long we have this current stock. These are now supplied with an oxygen sensor relocation kit which is required to fool the ECU into thinking the first cat is still there and stopping the MIL light coming on. You will need to install a bung behind the second cat and using the supplied wiring harness, move the second O2 sensor down, after the secondary cat. Click here for fitting instructions.Fits all Mk3, Mk3.5 & 3.75 models, 2005>2015Please Note: As from January 1st 2012, the UK MOT laws changed regarding catalytic convertors. Any vehicle built after 1992, MUST have a catalytic convertor fitted regardless of whether or not it passes an emissions test. Any car presented without a cat fitted will fail. Effectively, these stainless manifolds remove one of the two convertors fitted to the Mk3, so we have no choice other than to recommend that they are for off road use only. As your car would still pass an emissions test wth one of these manifolds fitted, it is unclear as to whether or not the one remaining cat is sufficient, so we would advise checking with your MOT tester before fitting this manifold if the car is being used on the road.

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Phone:

02392 644588

Email:

sales@mx5parts.co.uk

Location:

1 Orion Court, 5 Rodney Road,,
Portsmouth
PO4 8SZ

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Adam Goodley

Verified Reviewer

“Yep, its good alright. Better than the racing beat im happy to say, and yes i have seen both in the flesh. First off i have a decat midpipe and the mx5 parts rear silencer and with this fitted its really loud, smelly too. I expected this, but actually after having it on for a couple of hundred miles it has quietened down a bit, its not as agressive sounding. Pops and bangs in almost every gear change and defiantly on overrun.... love it. This isnt for the faint hearted if you have a backbox fitted too, this will not go with the road or race backbox made by cobra because it will make you deaf in a minute. This isnt a DIY job really as you need a high rise ramp, its worth paying and getting it done properly and to just sit back as it looks a pig of a job. You will need to get the ecutek licence so that you are able to get rid of the error codes it will bring up, i have also had to extend and re route the o2 sensors as the extention plug it came with wasnt the right one. No idea why, bit annoying really.You will need to get a proper remap when you have fitted this to get full gains of the new power otherwise your doing it for the sound. But yeah i love it, sounds like a v6 and power gains are substantial with remap.”

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Posted 11 years ago

“I just wanted to add a note to say my MX5 passed its MoT fine with only the second cat futted. Emissiins were fine,so don't worry about it being non-compliant.”

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Posted 12 years ago

“What a lovely piece of kit. It's not often you shell out £300 on a bit for your car and you feel loathed to fit it because it's so well made! Fantastic service from MX5Parts, as this turned up less than 24 hours after ordering. It took about 7 hours to fit on axle stands, and the result is superb: much better response and power from 2500 rpm onwards. The sound volume increase is only barely noticable when fitted to a standard mid pipe and rear box. It sounds a bit more "sports car" though and my wife approves. It arrives in a posh box complete with gaskets and O2 sensor "Hoodup SIM". You will not need additional gaskets. You can find a useful step by step guide here: http://forum.miata.net/vb/showthread.php?p=4703239However.... I must warn you not to attempt to fit this without ample tools. Don't expect to start this on a Sunday afternoon on the drive, armed with only an adjustable spanner and a blunt screwdriver! You will need:15mm swan neck ring spanner. Deep sockets and lots of wobble extensions. Ratchet spanners with swivels. 22mm O2 sensor socket. Multimeter and soldering iron. Wire wool and copper slip.Stilsons. I removed the old manifold (a pig!!!) without draining any coolant or touching the alternator. Take you time as the nuts are soft. A swan neck ring spanner is essential for this and access to the rear 2 is best from underneath. Wear gloves as you'll rip your hands to shreds when the nuts finally move - as i did. Take off the heatshields and remove the studs which bolt up the midpipe. You see what's in the way before waggling the manifold out. In contrast, the new one flies in. The new gasket supplied with the manifold is too thick - the stud threads won't poke though the nuts so I wire wooled the old tin gasket and reused that. To aid fitting, I left the studs and sensors off until it was in situ. Bolt up the head before fitting the engine bracket to the bottom. I had to open the bracket holes up a few mm to allow it to line up. There must be a stack up of tolerance but easy to overcome. Then the faff starts....You need to be handy with a soldering iron to modify the O2 sensor flyleads. They BOTH require lengthening!! I even removed the dish fitted to the upper sensor to facilitate tightening it up as access is compact under the car. Follow the wiring diagram and you shouldn't have any snags. Vrooom vroooom.”

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Posted 12 years ago

Floris Anna Bitto

Verified Reviewer

“Veramente stupendi! il suono poi è fantastico se abbinato ad un terminale!Provvedete a trovare una prolunga perchè i fili per i sensori di O2 sono molto tiranti!!!”

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Posted 15 years ago

Claudio Frasca

Verified Reviewer

“Appena istallati, veramente fantastici!Sound spettacolare con i silenziatori di serie, ottima resa prestazionale, più coppia dai 2000giri in su ed aunche i cavalli dovrebbero essere un pò di più... insomma ne vale la pena!P.S. Per l'istallazione occorre una prolunga per i sensori che và acquistata altrove ma costa poco!”

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Posted 16 years ago