The Lavochkin La-7 was an improved La-5.
The wing was made of metal. The leading edges of the wings were aerodynamically improved.
The La-7 had a Shvetsov radial engine installed (1,775 HP). The cowling over the engine was smooth. The La-7 had the oil radiator moved to the bottom of the fuselage.
A few La-7s had a rocket installed in the rear to allow for short bursts of speed. The increased speed was about 10-15%.