remaining AMX-30 tanks and variants with 500 Renault Mack E9 750 hp engines. In the nineties, a reactive armour package, named BRENUS or Brennus, was developed for the AMX-30B2, but was issued only to two tank regiments, which in peacetime were combined into the 1er/ 2e Chasseurs, that were part of France's rapid reaction force; the other two regiments using the AMX-30, the 2e/5e Dragons, only had their tanks adapted for a possible relatively quick upgrade, in case of an emergency. The BRENUS system used 112 GIAT BS (Brique de Surblindage) G2 explosive reactive boxes with a total weight of , offering a protection equivalent to of steel at 60° versus shaped charges and more than of steel versus kinetic energy projectiles such as APFSDS. During the 1990s, the AMX-30 has also been used as a testbed for several stealth technologies, including air cooling of hull surfaces and the use of visual camouflage. This prototype is known as the Démonstrateur Furtif à Chenille. Its hull and turret are fully covered by a superstructure built of angled plates made of radar absorbent material. In the late 1980s, a consortium of West German companies developed the Super AMX-30 modernization package for AMX-30B. The consortium itself consisted of AEG, Krupp Atlas Elektronik, MTU, Wegmann & Co., Diehl, ZF Friedrichshafen, and GLS. The upgrades to the power packs were new MTU MB833 Ka501 diesel engine with 850 hp, ZF LSG-3000 automatic transmission, new engine cooling system, and increased fuel capacity up to 1,028 liters. The upgrades on mobility also includes upgraded torsion bars, hydraulic shock absorbers, new slightly larger road wheels, and Diehl Type 234 tracks. The fire control systems were upgraded with MOLF-30 modular laser FCS by Krupp Atlas Elektronik, gyro-stabilized gun and gunner's day/night sight, laser rangefinder, and fully electric turret drive. Optional additional armour on the turret also available per buyer request. A single prototype was made and were publicly unveiled and tested in Saudi Arabia. The upgrade failed to find a buyer. Comparison to contemporary tanks Variants The AMX-30 has a number of different variations, including a number of other armoured vehicles based on the same chassis. A simplified version of the tank, without the infrared searchlight and periscopes and a less complex commander's cupola was developed for export, known as the "basic AMX-30". This version also came devoid of the pressurized air filtering system, and moved the smaller machine