http://www.factoryfive.com/roadster/update/Mk4.html
Summary of Mk4 Changes and Upgrades:
All-New Vintage Roadster Body
Original style one-piece hood with separate rivet-on hood scoop
Rounded rear trunk and concealed trunk hinges
Rolled-edges on cockpit surround and inset dash
Revised doors, door liners, hood, hood liner, trunk and trunk liner
Vintage style 1.5” roll bar design that is still safe
Concealed body mount bolts at front brake duct and side body mounts
Re-shaped wheel openings
Lowered rear body conceals fuel tank
Re-shaped nose detail and revised radiator/
oil cooler opening
All-new molds and standard red gel-coated body requires less bodywork
Upgraded Mk4 Frame/Chassis
New flush front bumper mounts with concealed body mount fasteners
Round tube front suspension x-member
Improved front suspension geometry, new spindles
Improved over-all torsional rigidity
Bolt-in rear suspensions allow 4-link and 3-link interchangeability
Enlarged driver AND passenger footboxes
Relocated seat harness mounts
Mid-trunk battery location
Revised cockpit aluminum (upper and lower rear cockpit pieces)
Lowered trunk area and fuel tank access panels
Other Changes/Upgrades:
Focus on cockpit space for driver and passenger includes new seat for bigger guys, more footbox space for driver and passenger (!)
New radiator overflow tank
New optional soft top
All-new complete kit Mk4 assembly manual and electronic PDF version system with lifetime tech updates via e-mail