This is an optional product particularly beneficial during the hot summer months. We utilize a fine 'flat fan' spray pattern nozzle positioned adjacent to the intercooler core. We incorporate high quality stainless steel fittings and mounting bracket which connect via supplied nylon tubing to the OE headlight or rear washer pump and reservoir.
Also in the kit is a sprung loaded toggle switch for the dashboard, wiring and inline fuse holder. Intercooler efficiency increases considerably when wet. This is certainly no gimmick!
£69+vat
GTT EXHAUST RE-ROUTE PIPE
This is included in GTT240 conversions and above. This product effectively gives you aftermarket system benefits at a fraction of the price, whilst maintaining the stock tailpipe appearance.The OE system is a mind boggling maze of tight bends with two silencers.
The GTT Re-Route pipe deletes many of these bends and one of the silencers, reducing restrictions and giving a better exhaust note in the process (not to loud).
As an added bonus it also removes nearly 20lb in weight! It is manufactured from S304 stainless steel, TIG welded throughout & mirror polished. Comes complete with new clamps.
£79+vat
GTT CAMSHAFTS
This product is included in GTT 240 conversions and above. Produced to our own spec further increasing power output with no loss of low end power whatsoever.
The spec is a little special in that it we use different cam timing for the inlet and exhaust valves as well as increased lift on both. This cam is optimised for the 'S' and is not a compromise cam designed for both 'S' and non 'S' Minis. It is available as either a new billet replacement cam or as a re-ground OE cam. Either way the timing & lift is identical.
From £289+vat (exch)
GTT ADJUSTABLE VERNIER CAM SPROCKET
Having spent considerable time checking & testing cams one thing we have found is that the car manufacturers timing can be out by up to 3 degrees (crank angle) also as the cam chain wears it stretches and retards the cam timing. To combat this, our GTT adjustable sprocket allows simple, easily accessible adjustment of the timing: either to the manufacturers spec (using a drop-clock and degree disc) or with rolling-road power runs to optimise power output. GTT include this product when fitting our cam (exchange) .Why settle for nearly right when you can have provision for absolutely right!
From £69+vat (exch)
GTT 63mm LARGE THROTTLE BODY
This product is included GTT240 conversions and above.
The STD 57mm throttle body when modifying to higher levels of power becomes a restriction that needs to be removed. Consider also that at wide open throttle the excessively wide butterfly spindle imposes a further restriction (a reduction of 570 square mm's) reducing the cross sectional area to the equivalent of just 50mm diameter!
At GTT we precision bore to 63mm diameter. This size perfectly matches the internal diameter of the SC inlet plenum which it is bolted and dowelled onto. The surface finish is maintained to CLA 32 or better. In other words very fine and accurate, ensuring no sticking throttle plate or leaking at idle. We have seen other offerings that would make a ploughed field look flat! Throttle bodies are sold on exchange. Where possible the customers own part is modified.
£239+vat (exch)
As an optional extra we can further increase cross sectional area at wide open throttle by careful removal of much of the throttle spindle (POA)
GTT Stage 1 Gasflowed/Ported Cylinder Head
These are reworked in house by GTT. Combing 14 years of gasflowing experience and a lot of hard work; the results are outstanding. More power, better fuel consumption and improved reliability through everything working more efficiently. You really can have your cake and eat it!
£499+vat (exch)
GTT Stage 2 Gasflowed/Ported Cylinder Head
With the stage 2 things get a bit special. Firstly the exhaust ports are CNC milled out to achieve perfect port size, shape and position. We are unique in using true 3D cutter paths, cad-cam generated. Long series ball nose cutters machine the ports achieving true 3D transition from port face to throat. Only GTT do this! No manual method can achieve this level of accuracy, nor maintain consistent metal removal this far down the ports.
Secondly the exhaust valve seats are increased in diameter by 2mm internally, giving big improvements in getting the exhaust gasses out. On top of this there is still around 25 hours of manual fettling and polishing carried out on the inlet and exhaust ports, throats and combustion chambers. We also flow the manifolds and even the exhaust header pipes if required.
To make this the best available we have a few tricks up our sleeve. Firstly we use TIG welding throughout; this is vastly superior to MIG welding used by most. It's better penetration resulting in a much stronger, smaller, & neater weld. This takes a lot longer to produce, but we think the Mini deserves proper engineering! Secondly we use not only 1.5" tube for the primaries but 2.5"(rather than 2.25") for the secondary pipe & flexi coupler. The flange plate is machined to the exact profile of the OEM manifold gasket; no steps & no restriction. Manifolds with round holes on the top flange plate are no good at all, they however much cheaper to make. The head ports are a rectangular shape with R15 rads on the top 2 corners and R6 rad on the lower 2 corners. The manifold needs to match this, then achieve good smooth profile transition into the 1.5" diameter primaries.
Finally we have opted for a 1.2mm narrow wall tube to reduce weight, remember weight is the enemy!
The new 120CPSI high efficiency/flow sports cat is unique in that it is a separate section, flange mounted at each end between the GTT manifold and the exhaust system. This allows quick and easy changeover without removing or disturbing either part. Why would I want this? Two reasons ,one is it allows our optional GTT 'cat bypass link pipe' to be easily substituted for track days & racing, releasing more power and reducing weight in the process. And secondly it gives provision for simple & cost effective cat replacement i.e. you don't need to purchase a complete new manifold too we have seen some aftermarket sports cats failing after just 30000miles.This shows as faultcode P0420 'catalyst system efficiency below threshold' and can cause mot failure and emissions test fail. With our system should the cat eventually become contaminated, you can purchase just a replacement cat, much cheaper & much easier to fit. NB The GTT Sports Manifold / Cat can be used with most exhaust systems. Fits all petrol models.
This is an optional product particularly beneficial during the hot summer months. We utilize a fine 'flat fan' spray pattern nozzle positioned adjacent to the intercooler core. We incorporate high quality stainless steel fittings and mounting bracket which connect via supplied nylon tubing to the OE headlight or rear washer pump and reservoir.
This is included in GTT240 conversions and above. This product effectively gives you aftermarket system benefits at a fraction of the price, whilst maintaining the stock tailpipe appearance.The OE system is a mind boggling maze of tight bends with two silencers.
This product is included in GTT 240 conversions and above. Produced to our own spec further increasing power output with no loss of low end power whatsoever.
Having spent considerable time checking & testing cams one thing we have found is that the car manufacturers timing can be out by up to 3 degrees (crank angle) also as the cam chain wears it stretches and retards the cam timing. To combat this, our GTT adjustable sprocket allows simple, easily accessible adjustment of the timing: either to the manufacturers spec (using a drop-clock and degree disc) or with rolling-road power runs to optimise power output. GTT include this product when fitting our cam (exchange) .Why settle for nearly right when you can have provision for absolutely right!
This product is included GTT240 conversions and above.
These are reworked in house by GTT. Combing 14 years of gasflowing experience and a lot of hard work; the results are outstanding. More power, better fuel consumption and improved reliability through everything working more efficiently. You really can have your cake and eat it!
To make this the best available we have a few tricks up our sleeve. Firstly we use TIG welding throughout; this is vastly superior to MIG welding used by most. It's better penetration resulting in a much stronger, smaller, & neater weld. This takes a lot longer to produce, but we think the Mini deserves proper engineering! Secondly we use not only 1.5" tube for the primaries but 2.5"(rather than 2.25") for the secondary pipe & flexi coupler. The flange plate is machined to the exact profile of the OEM manifold gasket; no steps & no restriction. Manifolds with round holes on the top flange plate are no good at all, they however much cheaper to make. The head ports are a rectangular shape with R15 rads on the top 2 corners and R6 rad on the lower 2 corners. The manifold needs to match this, then achieve good smooth profile transition into the 1.5" diameter primaries.
Finally we have opted for a 1.2mm narrow wall tube to reduce weight, remember weight is the enemy!
