Description
The Original Product – The Boost RingĀ® – Another performance mod for your Land Rover 200 or 300 tdi engine.
This little ring drops into your fuel pump giving you mid range performance gains on your diesel engine. Fitting takesĀ just a few minutes.
Full installation video Below
Worldwide Shipping
This spacer ring allows more travel on the control piston for the timing advanceĀ within the fuel pump. ThisĀ allows slightly more advanced timing at higher revs, allowing the power to remain longer before it flattens out at the top end.
This means a stronger pulling engine.
This is a tuning product. By fitting this, you will elevate the level of tune in your engine.Ā Running higher cylinder pressures willĀ expose any engine weaknesses.Ā Fit this product entirely at your own risk. We recommend fitting an “Exhaust Gas Temperature”Ā guage so that you can monitor your engine and react accordingly.
Kit contains:
- Boost RingĀ® – Ā 200Tdi & 300Tdi
- High quality Seal – NBR ‘Fuel Grade’ Nitrile Rubber
- Replacement Screws
- Shims







Anonymous –
from Anonymous on 26/07/2017
I’ve had the boost pin fitted for a couple of years now after fitting the pin my land rover did smoke a fare bit but after seeing the comment about the boost ring stopping the smoke a good bit I thought I’d give it a go, I must admit I had trouble getting the bolts on my pump undone but once I had the ring was easy to fit, once fitted I gave the landy a blast up the road a lot of the smoke had gone I am please lol.
Spoke to Neil at kelmarsh show about tweaking things a bit more so hopefully once I get it sorted it will be 100% perfect
I’d recommend the boost ring to anyone
Thanks Paul
James Barlow –
James Barlow on 13/10/2017
Fantastic old fashioned customer service. Which makes a change. Package arrived as promised without any problems. The Boost ring kit is of a good quality and everything fitted as per the very informative Youtube video.
Well done to all of the Fourby team. I look forward to using your services again and I will be recommending you to others.
Please keep up the good work and quality of your products.
brett66 –
from brett66 on 03/02/2018
Been in a couple of days and is definitely allowing the motor to rev up quicker in the higher register. Has given the 300tdi a little more top end power. Instillation is quite fiddly but doable.
Anonymous –
from Anonymous on 15/03/2018
Hi Ms Cope I would like to inform you that I am pleased with the boost ring.It is very simple to install but as I have a friend of mine who is a diesel pump and injectors expert who understood how it works exactly so I was knowing what I was doing.the boost ring works fine.in my 200tdi defender I had only one spring and one shim and I just done the ring wit two extra shims .the response was impressive and no engine chattering noises and smoke.if you do less shims the engine might chatters like when it is overadvanced from the timing.best regards
Anonymous –
Was a little fiddly to fit on my 200 tdi due to some very stuck bolts. My 200 tdi only had a single spring which i believe is common, so don’t worry if the video showed 2 springs. I left all 3 washers in and it made a massive difference to the performance. No visible smoke on my stock pump and a nice increase in power. I’ve since installed the boost pin too which made a difference but not as much as the ring did.. Go get one!
Fourby –
from John S on 06/06/2021
With the boost ring installed in conjunction with the boost pin the transformation of my 130 Defender has been amazing, With my trailor attached able to do hill starts with minimum effort compared to pre mods and a lot less smoke, highway motoring is easier as the motor is running a lot freer and can now actually give a good interpretation of being able to accelerate. EGTs are either the same or actually a few degrees less than before the pin and boost ring were installed. The jury is still out on the effects on fuel usage. Overall a excellent product and for the price a massive return on investment
Fourby –
from Matthew whyte on 11/05/2021
Havent fitted yet, just waiting for a couple mods to be finished before I install. But Was impressed with the quick postage all the way to tasmania. Will give feed back on results shortly.
Fourby –
from Mike Aubert on 07/04/2021
Nicely made item. I was a bit confused as the video showed 2 springs under the cap in the pump and on my 200Tdi I only had one, but after checking the parts manual I stopped worrying! A bit of a pain to get the old torx screws out so take care not to round them off. New parts fitted well (if not easily due to space restrictions) and while its difficult to feel any difference with this modification being done on its own (I previously have tuned the pin etc), it makes sense that this has to work from looking at the design and operation of the pump.
Fourby –
from Theo Van Ham on 29/03/2021
Installed the Boost ring together with Morgan Hill Boost pin, Pressure gauge set and boost controller set.
All together this was making a huge difference in torque in my 200TDI.
Hardly any additional smoke when applied all together.
Fourby –
from Darryl Pooley on 03/03/2021
The Boost Ring fitted in conjunction with a Boost Pin gives plenty of Oomph. I did not expect the difference in power in the lower gears, but to be honest its really very good and I’m chuffed to bits. A little awkward to fit (you need very small hands) and lots of patience, but its well worth the effort.
Fourby –
from Anonymous on 01/11/2020
review now after a test period, exceptional result, I also have the boost pin and the knurled wheel lowered by 2 laps, no smoke and the car has changed a lot, a pleasure to drive it now, very responsive the accelerator pedal, very satisfied.
Fourby –
from Vincenzo La Manna on 11/10/2020
assembly a little difficult, I replaced the two allen screws, with two studs and relative hexagonal nuts, much simpler, because the studs keep everything in the guide, then the nuts are tightened comfortably
Fourby –
from Ian on 15/07/2020
Easy to fit, smoothed out the running of my 200TDI. Fourby very helpful in answering my questions, 200TDI pump slightly differnet from 300TDI, it has just one spring.
Fourby –
from Chris on 15/06/2020
Very good, adds more power without effecting fuel economy much. and not that expensive A bit fiddly to fit but patience and the right tools are helpful.
Fourby –
from Steven Price on 31/05/2020
Fitting is nice and easy. You need to be careful removing your old bolts.
The kit comes with everything you need. Even a sticker which is a nice touch. It’s all very well packaged. Simple instructions online to follow or a video if you’re not sure.
I had to use the cable tie method for refitting due to shaky hands.
I fitted it with 3 shims it came with. Plus the 2 I already had. Its reduced alot of the smoking from the boost pin being fitted. Will look into removing a shim or 2 to try. Looking into an Egt now.
Fourby –
from Neil matthews on 22/03/2020
boost ring fitted along with boost pin and lift pump spacer has made a huge difference in the driving of my 300TDI
Was bit fiddly to get bolts out but cut down an allen key and it was no bother after that
Will be ordering more bits to increase performance and once all together will be spot on
Fourby –
from Jan Bakker on 12/03/2019
Its gives a better and cleaner exhaustgas than fiddling arround with just delivery rate/ starwheel adjustments and /or the smoke adjustment screw. Follow the Fourby instruction and by mounting the Boost pin and the Boostring you get what is described. When mounting the Boostring it will make it more easy to use some f.e. sticky vasaline on the fanges and O ring preventing it not to fall apart while mounting it on te EV pump.
Fourby –
Product as described, but the extra advance does make extra combustion knock at a small part of the rev range.
Unfortunately, this is the RPM where my 300TDI 110 (with 255/85R16s on a 1.4:1 transfer case) sits most of the 15 miles to work in the 50mph speed limit, and consequently I removed it a couple of days later to reduce noise.
That said, driving around lanes and urban areas etc, the engine does not sit at this RPM for prolonged periods, so for most drivers the issue I experienced will probably not be cause for concern.
Fourby –
from Mats on 21/11/2018
This is bang for the bucks… Quality and great product!
Easy install and exellent help from the Fourby team.
I bought the Boost Pin and Boost Ring together and it is worth paying a bit extra.. My only regrett is that i didnāt get this done long time a go.
Fourby –
from Anonymous on 17/08/2018
On my LD 300Tdi with 265.000 km on the clock the Boost Ring does exactly what the producer claims it should. More power, engine runs smoother, reaction on gas pedal gets better by far. Together with the Boost Pin the engine pulls definitely stronger on low as on high revs.
Fourby –
from Anonymous on 11/07/2018
I fitted the boost ring as the only performance mod to my defender 200tdi. The difference is incredible – night and day ! Ok it’s no ferrari but it is smoother, more responsive and much quicker. My only issue was getting the original torx t30 bolts out, but the kit comes with replacement hex ones so I chiselled them off in the end. I was worried the car may smoke on acceleration, but nothing – it’s fine. I would recommend.
Fourby –
from Anonymous on 16/06/2018
Noticed a huge difference in boost with my 110 defender. Would recommend also getting the boost pin for a better performance.
Fourby –
rom Anonymous on 03/06/2018
well fitted the boost pin and the boost ring i cannot believe the difference in the discovery towing the caravan is a dream.i am well pleased with both products .
and the 300tdi is still good on fuel.will recommend your products to any body with a landrover 300tdi engine.
Fourby –
from Anonymous on 20/04/2018
I fitted one of these boost rings to my 200tdi lightweight and the difference was instantly noticeable. The engine feels smoother and pulls stronger. I have just ordered a boost pin to go with it. The installation is fairly straight forward if you are a mechanic. However on the 200tdi engine because the cap on the fuel pump is held on with rubbish torx screws [ as stated in the video ] which are not the easiest things to get at without damaging the head of the screw, I found the easiest way to get at them was by removing the adjacent breather cover from the engine. This then gave easy access to the torx screws which although tight came undone without stripping the bit where you insert the torx key or socket drive .Reinstallation with the cap screws provided was no problem. A straightforward job that just took a bit longer than expected. Very pleased.
Fourby –
from Basil Fanahawe on 15/04/2018
After installing the Boost ring , I had my 90 loaded with my trailer so the combination was fairly heavy , and I found that the power increase was noticeable , I was very impressed with how much crisper the engine ran ,it felt just like a reconditioned injector pump , the smoke was decreased and it pulled better on the hills .
Fourby –
from Anonymous on 10/03/2018
Yesterday we installed the boost pin as well as the boost ring and the both do indeed give al lot more poweroutput . I? very satisfied with these products. Laer this year we?e going to make a 4×4 trip to macedonia and we will send you some fotographs of that
Fourby –
from simon james on 28/02/2018
after watching the you-tube on how to install, it was very easy to fit
It has made an overall improvement to engines pulling power and top speed. very impressed
Fourby –
from Anonymous on 13/02/2018
just fitted it took half an hour to fit. fitted boost pin had slight smoke under load. just taken it for a spin the smoke has gone and it feels more responsive throughout the gears, pulls stronger mid range. would recommend this simple mod alongside the boost pin…
Fourby –
from Anonymous on 04/02/2018
Top Tip, do not try and fit this over a gravel drive…If necessary, put a tarp down first to catch the shims / springs if needed.
Have fitted mine with 3 Shims in place, I have had a boost pin fitted for the last 2 years. There is a difference at higher revs, I notice it most about 50 to 55MPH it feels smoother. Next step is to remove a shim and see how that feels.
Fourby –
from Anonymous on 04/02/2018
Easy to fit pin and ring, simple, clear instructions. Very subtle improvement, significant power increase, engine feels snappier at all revs. Appears to have actually reduced the amount of smoke! Very happy, recommended def, do Fourby do any other 300 tweaks?
Big thanx
Ian
Matt –
I fitted a boost pin a few months back to my 300tdi discovery, and noticed a vast improvement of power to my very sluggish truck ..
Then I was notified by neil that they also sold boost rings. Not knowing anything mechanical about cars and engines and that sort of stuff .. neil started to explain about how things work and how it would improve my trucks performance a bit more .
This I had too do so I purchased a boost ring from fourby.
Neil went thru my fuel system and fuel set up to make sure it was performing to its best so once the boost ring was fitted the difference would be noticeable..
Well WOW what a difference it made .. totally transformed my trucks power
The difference is night and day …
I would recommend these quality products to anyone wanting better power performance from their truck ..
Thanks guys for a great product yet again and all the help and advice given from you
Atb Matt