Borla 88-90 Jeep Wrangler 4.2L 4WD Cat-Back 2.25x2in Single Square Intrcld Rr 2.75x2.5in Sqr x6.5inBorla 88 90 Jeep Wrangler 4. 2L 4WD Cat Back 2. 25x2in Single Square Intrcld Rr 2. 75x2. 5in Sqr x6. 5in The BORLAA*A? sound of power. Its been described as asonic shot of adrenaline. An intoxicating concert ofsteel, gears and combustion that echoes from thespeedways, deserts and highways of the world. The sound of more victory laps than any otherbrand, the BORLAA*A? exhaust note has become the quintessentioal soundtrack of high performance motoring.