They say: Design from the outset has been to offer subtle unobtrusive style while still achieving maximum performance both in horsepower and torque gains, with unique sealing at the slip joints to ensure no unsightly mess, and ground clearance/cornering lean angles. Completely bypasses Triumph’s CAT, de-restricting airflow from the engine and releasing a deeper sound. Only you can answer that. If you're hunting for the most thrilling Focus RS sensible money can buy, you'll find the M520's duality impressive.The powertrain'sdocile persona when the turbo isn't lit makes the carnoless usable than the standard Focus RS in normal driving, which is nothing short of amazing when you consider how switched on the driver needs to be when500bhp and 500lb ft is flowing. Dean at JB was also trying to think of an excuse to justify taking the B-Race home to put on his Lambretta but apart from the fact we needed it for the next part of our test, my missus has had her eye on one for her TS1 for months now!

And if those gains aren’t enough, S&S have also created a washable hi-flow air filter, which increases air flow to the injectors by 12%. And if you want even more, there’s a cover eliminator that boosts airflow by almost double. Another point worth remembering is that if your use is touring, then ordinary steel exhausts are easier to weld than stainless steel items, thus you’re more likely to find someone who can fix it (even if only temporarily) if you’ve snapped a pipe in the middle of nowhere. Oh and despite having to trim fins to fit the TS1-like barrel stubs of the JL and B-Race, this is a small price to pay I feel for improving what is a terrible design flaw of the Lambretta and making it far easier to remove the exhaust in the future. I would agree with the “drill through the first baffle” approach, as that’s exactly what I did over 10 years ago. There was no drop in performance that I could notice, just a slightly raspier note upon harder acceleration that I (sadly) found rather nice, but the car is absolutely not a nuisance for other road users, and there is no change to the comfort of touring. To keep your engine even happier, S&S can also supply a Power Commander kit to make the most of all this new found oxygen. Inside the engine S&S have developed their own high performance camshaft, which increases valve lift while also keeping them open for longer (duration).They say: Well-established design originally pioneered by Arthur Francis and continued lobe produced today with slightly altered design for mass production. More recently we have also altered the material to a zinc plated mild steel to help against corrosion, and increased the gauge of the internal baffles to increase the robustness. The result is an engine that builds power earlier in the rev range and holds it all the way to the redline. If you really know what you’re doing, you can even adjust the timing to suit how you want the bike to feel. Peco exhausts are made to fit specific applications. Their assembly plant uses precision manufacturing jigs to ensure exact replication of all original prototypes. They say: This is aimed at tuned engines on Series 1 and 2s. We think that the JL road and race pipes are the best value for money pipes on the market, especially for an European product, light and easy to fit. Type: Intriguing snail-like design, unobtrusive, performance pipe, handmade from 1.6mm mild steel in the UK.

They say: The Ancillotti is an all-rounder aimed at all engines, tuned and standard, for people that want to retain the standard look, and you can remove the head cowling without removing the downpipe. And so thrashing the scooter on the dyno could commence. For each exhaust, once warmed up the scooter was ‘ridden’ through all four gears and a reading also taken of a third gear roll on, the results of which have been published here. From 2021 Triumph has introduced new Euro 5 models and have started phasing in anti-tamper, welded on rear link pipes to the Cat unit on some models. If this is the case on your bike the Cat unit will have to be removed before installing the system.If they are unable to make delivery, a calling card will be left to inform you of the attempt. Couriers will generally make two attempts of delivery; after this time it will be your responsibility to collect the parcel from the local delivery depot near you. They say: “A clubman for a larger capacity and torquer engines, less bottom end but 1000rpm rev on over rivals.” The Casa pipe makes a wider spread of power at a wider rpm suggesting it would be good for two-up touring, the flare tail having slightly more torque although the clover tail is more consistent. Out of all the standard looking pipes here though the AF is the one. It has the power and the price. The Sito Ancilotti one is okay, but it’s still no better than the AF power-wise, though it does rev on a bit, which suggests on a Stage 4200 the Sito may be the better of the two.

Availability: Now, from AF Rayspeed (01944 710693 or www.afrayspeed.co.uk) and numerous other dealers. The engine moves around quite bit (quite normal!), so I would be careful about trying the restrain the front end of the system too much. The manifold is quite capable of supporting the front half of the system, without needing any additional mounts. For a second opinion beyond the conclusions we’ve drawn, we asked John Balcombe of JB Tuning, which as a long time scooter mechanic, tuner and racer is a pretty experienced one.Secondly, an area we have not commented on was the finish of the exhaust pipes because firstly some were supplied in prototype form, and secondly there was no time to ‘carefully run in’ some pipes as manufacturers suggest to keep the ‘coating’ intact. on most six cylinder engines. The after market in the USA are way ahead and usually know what they're on about as do the aftermarket in Germany. But what blasts they are. At around 2800rpm the torque curve spikes violently as the turbo wakes up and piles on 250lb ft in the space of 1000rpm. The acute torque-steer that follows is a candid reminder that the throttle pedal goes both ways, though if you keep your cool you’ll find the M520 never drags you screaming into a hedge, no matter how real the threat at first may seem. Forty years at the forefront of automotive exhaust manufacture and ISO9001 quality assurance guarantees your piece of mind.• Mild or stainless steel construction