4WD Ford Focus with a Turbo Cosworth YB

David Richards built this 2002 Ford Focus ST170 over the course of three years. Under the hood sits a turbocharged Cosworth YB inline-four producing 350 hp on low boost and 450 hp on high boost. The motor features forged internals, porter head, BD14 intake camshaft, GT3076R turbocharger, and Simtec ECU. A MT57 five-speed manual transmission and Sierra Sapphire RS Cosworth 4×4 drivetrain sends power to all four wheels. Behind the OZ Racing wheels (18×8) are Mitsubishi Evo 6 Brembo four-piston calipers with 330 mm rotors in front and Sapphire RS Cosworth 4×4 calipers with ST170 300 mm rotors in back. The car has changed some since it was featured in Fast Ford’s article from 2020.

Full Specs:
Engine:

• GT3076R turbocharger
• New crank and rods
• New pistons and bore work
• WRC Cosworth multilayer head gasket
• 4×4 piston squirts off pump
• 4×4 block standard bore
• polished standard crank
• ported and polished 4×4 head
• BD14 inlet camshaft
• standard exhaust camshaft
• 4×4 inlet manifold
• 2wd exhaust manifold
• 3-inch exhaust
• Simtec ECU (Drive by wire throttle, Coils on plug) done by AG Motorsport
• 350 hp on low boost
• 450 hp on high boost

Drivetrain:

• MT75 five-speed manual transmission
• AP 6 paddle clutch with high pressure plate and hydraulic conversion
• Sapphire RS Cosworth 4×4 front and rear diffs

Suspension:
Front:

• electric power steering
• adjustable track control arms
• Comp struts
• adjustable top mounts
• bladed anti-roll bar
• Evo 6 Brembo four-piston calipers
• 330 mm rotors

Rear:

• custom WRC rear cradle
• WRC-spec billet hubs
• bladed anti-roll bar
• Sapphire RS Cosworth 4×4 calipers
• Focus ST170 300 mm rotors

Fuel:

• Custom baffled tank with swirl pot -8 fuel lines to cossie filter and 044 fuel pump -6 braided fuel lines to 10mm black alloy solid pipe under car
• Aeromotive fuel pressure regulator
• billet fuel rail

Body:

• stitch welded
• Sierra Cosworth front and rear chassis legs added to shell with gusset plates in engine bay and around suspension pick up points
• genuine RS rear quarters, wings, bumpers, tailgate, and spoiler
• 4×4 Cosworth vents in bonnet

Interior:

• Aim mxs 1.2 strada dash
• 4×4 Cosworth raven carpet
• 4×4 Cosworth center console
• Focus RS Mk1 push button start
• Focus RS Mk1 interior
• Focus RS Mk1 steering wheel

Source: CMS Car Sales, Sitech Racing FB page, and Fast Ford