Wow this combo rocks!!! The Tamiya Porsche is the Expert Built Version. Newly designed TT-01 type E chassis features brand new A Parts (Uprights) and D Parts (Upper Deck). A Parts are made from durable polycarbonate plastic material while D Parts are made from feberglass-reinforced nylon material for greater strength. These parts are now also separately molded to enable easier maintenance (regular TT-01 had damper stay and gear case molded as one piece). Improved steering linkage design features TA05 steering posts for sharper steering response. New upper deck enhances chassis rigidity and mimics Tamiya's high-level race-spec machines. Upper deck also features a convenient transponder mount to further encourage fans to go to their local track and experience R/C racing. Rear suspension arms installed in reverse position to create shorter wheel base for greater scale accuracy. 4WD shaft-driven bathtub chassis with coil spring damped, 4-wheel independent double wishbone suspension and sealed front and rear gearboxes. Unmistakable Porsche 911 fully painted body is accurately reproduced with lightweight polycarbonate. And all this along with the Li-Po battery 3600mAh Yeah racing? U r the best!!!