GFB External Wastegates

GFB EX38 - 38mm V-Band Style External Wastegate

GFB

The EX38 features a 38mm valve and comes standard with a 10psi spring. Additional springs are also available - by using various combinations of 5psi, 7psi, and 10psi springs, you can achieve base boost pressures of 5, 7, 10, 12, 15, 17, and 22psi*.Standing only 93mm tall, the EX38 is shorter than its nearest rival. The inlet flange I.D. features a tapered entry to assist a smooth transition from the exhaust pipe into the valve, and the seat I.D. is larger than other wastegates of the same size for extra flow.The EX38 is directly compatible with TiAl MV-S flanges, meaning you can use the EX38 on turbo kits designed for TiAl wastegatesWhen it comes to external wastegates, some things you want big, others you want small like big flow, small size, right? GFB offers a range that are among the most compact external wastegates in their class, being shorter in height than their closest rivals without sacrificing flow.All GFB wastegates feature an investment cast body made from 253MA chromium-nickel stainless steel, a CNC machined billet stainless valve, and all stainless steel weld-on fittings and hardware, whilst the diaphragm is nomex-reinforced silicone. All this adds up to a wastegate built to handle extreme conditions with reliability you can trust!Most compact wastegate range on the market!Body, valve, seat and all mounting hardware is CNC machined from high-temp stainless steelActuator housing CNC machined from billet 6061 aluminiumNomex-reinforced silicone diaphragmInternal shroud protects valve stem from excessive heat and prevents carbon-related stickingV-band clamp mounting systemMade in Australia under ISO 9001*Spring pressure rating is a guide only. Actual boost pressure achieved may be different depending on the turbo, exhaust manifold and engine combination.

£300.90£250.75 (ex. VAT)

GFB EX44 - 44mm V-Band Style External Wastegate

GFB

The EX44 features a 44mm valve and comes standard with 15psi springs installed (1 x 10psi outer and 1 x 5psi inner spring). By removing one or the other spring, you can achieve base boost pressures of 5psi, 10psi, or 15psi. Also available is a 7psi middle spring, which can be used in various combinations with the supplied spring to achieve base boost pressures of 5, 7, 10, 12, 15, 17, and 22psi*.When it comes to external wastegates, some things you want big, others you want small like big flow, small size, right? GFB offers a range that are among the most compact external wastegates in their class, being shorter in height than their closest rivals without sacrificing flow.All GFB wastegates feature an investment cast body made from 253MA chromium-nickel stainless steel, a CNC machined billet stainless valve, and all stainless steel weld-on fittings and hardware, whilst the diaphragm is nomex-reinforced silicone. All this adds up to a wastegate built to handle extreme conditions with reliability you can trust!Most compact wastegate range on the market!Body, valve, seat and all mounting hardware is CNC machined from high-temp stainless steelActuator housing CNC machined from billet 6061 aluminiumNomex-reinforced silicone diaphragmInternal shroud protects valve stem from excessive heat and prevents carbon-related stickingV-band clamp mounting systemMade in Australia under ISO 9001*Spring pressure rating is a guide only. Actual boost pressure achieved may be different depending on the turbo, exhaust manifold and engine combination.

£331.26£276.05 (ex. VAT)

GFB EX50 50mm Wastegate

GFB

"With the manifold glowing...the boost never varies" - Joe SignorelliDesigned to cope with the brutal conditions of extreme exhaust temperatures, the EX50 features not only a huge flow capacity, but also a compact size that is unmatched by competitors for a 50mm wastegate.Supplied with a 13psi spring7psi and 9psi springs also available that can be ganged together with the supplied 13psi spring in various combinations to allow boost pressures of 7, 9, 13, 16, 20, 22 and 29psi.Body, valve and seat are made from high-temp stainless steelActuator housing machined from billet 7075 aluminium much stronger & harder than 6061Flow tests show that for the same valve lift, the EX50 outflows its nearest competitor by 18%Internal valve shroud protects valve stem from excessive heat and prevents carbon-related stickingTop-hat style Nomex-reinforced silicone rolling diaphragm for longer valve travel90° banjo-style boost hose connectorsV-band clamp mounting system, supplied with 304 stainless weld-on adaptors (base flange is compatible with TiAl 44 flange when used with GFB adaptor)Our main goal for the EX50 was to create a wastegate that had a very large flow capacity in a package that is physically as small as possible.  This was achieved with the use of CAD design which allowed us to minimise the amount of unnecessary bulk (particularly on the actuator).Good flow around a poppet-style valve depends on a smooth and generous bowl area into which the valve lifts.  Many brands do not allow enough room around the valve head for good flow, instead relying on increasing the valve travel as a band-aid solution.Joe Signorelli of Rotormaster and GAS Motorsport has done extensive testing on the EX50, on various high-powered circuit and drag engines (both piston and rotary), and most notably, on the brand-new 2JZ powered Celica. Of the EX50 Joe says I couldnt be happier with the way it performs.  Our circuit car comes into the pits after a race with the manifold glowing, and the boost never varies.*Spring pressure rating is a guide only. Actual boost pressure achieved may be different depending on the turbo, exhaust manifold and engine combination.

£485.10£404.25 (ex. VAT)

GFB EX50 50mm Wastegate

"With the manifold glowing...the boost never varies" - Joe SignorelliDesigned to cope with the brutal conditions of extreme exhaust temperatures, the ...
£485.10