In 1963, another modification of the Su-7 was developed, featuring an improved engine, increased fuel capacity, a drag parachute relocated from under the fuselage to a container beneath the vertical stabilizer, a new KS-4 ejection seat, main landing gear additionally equipped with skids enabling operations from unpaved airfields, jettisonable rocket-assisted takeoff boosters, and an increased weapons payload capacity of up to 2500 kg.
This version was designated Su-7BKL. The aircraft entered production in 1965, replacing the Su-7BM. In NATO code, the Su-7 carried the designation Fitter A. The drawbacks of the Su-7 included high fuel consumption, difficulty in handling due to its high landing speed, and poor cockpit visibility which made it hard to locate ground targets and attack them with conventional weapons. Poland purchased 30 Su-7BKL aircraft, delivered between 1966 and 1972.
| Wingspan | 9.30 m |
| Length | 16.80 m |
| Takeoff weight | 13 570 kg |
| Maximum speed | 2150 km/h |
| Ceiling | 17 600 m |
| Range | 1650 km |
| Armament | two NR-30 cannons cal. 30 mm, 2500 kg of underwing ordnance |
| Engine | AL-7F1-250 turbojet with 9600 kG thrust with afterburner |
