SpeedFactory 3" Cat-Back Exhaust Piping Kit for Civic Integra

SpeedFactory 3" Stainless Steel Mandrel Bent Cat-Back Exhaust Piping Kit

Every custom 3 inch exhaust on an EG, EK, or DC2 starts the same way: someone with a welder trying to recreate the factory routing one bend at a time, burning a Saturday and half a stick of filler rod getting the pipe around the rear beam. This DIY exhaust kit is SpeedFactory's answer. The hard parts, the bends and the routing, are already done. You supply the muffler and the welds.

What It Is and Why It Works

The kit is prefabricated T304 stainless steel tubing, mandrel bent so the pipe keeps its full 3 inch diameter through every bend instead of crushing down the way cheap press-bent tube does. The sections follow the OEM exhaust path on the most common FWD Honda and Acura chassis, so the finished system tucks where the factory system did instead of hanging below the rear beam waiting for a speed bump.

The design detail that separates this from generic pipe kits is the joint system. Each section has extra deep 5 inch slip joints, which gives you a big range of adjustment to position everything exactly where you want it. Then you weld the joints in final position. No flanges, no band clamps, which means none of the shifting, rattling, and slow leaks that clamped systems develop after a year of heat cycles. You also get five 3/8 inch stainless hangers fitted with oversized 1/2 inch stainless sleeves that grip your OEM rubber insulators tighter than the factory hangers did, so the finished system stays planted.

Muffler choice is yours. The kit accepts any muffler or resonator with center inlet and center outlet, which covers most of the popular race and street units, so the same kit builds a quiet street setup with a resonator and chambered muffler or a straight-through race system.

One honest sizing note: 3 inch is the right pipe for boosted builds and serious all-motor power. If you're running a bolt-on NA B or D series, a full 3 inch system is more exhaust than the engine can use and you'll give up some low-end torque for nothing. Turbo EG, EK, and DC2 builds are exactly who this kit is for.

Specs

Fitment

The routing is designed around the most common FWD Honda and Acura chassis of this era. Two fitment caveats worth knowing up front: aftermarket rear sway bars and rear subframe braces can interfere with the factory routing path in some cases, and since every car and setup differs, some cutting, fitting, and welding is part of the deal on any custom exhaust. That's the nature of the product, not a defect.

What to Know Before You Buy

You need a welder, or a buddy with one. This is a weld-together kit, not a bolt-together system, and that's exactly why the finished product is better than a clamped catalog exhaust. The smart workflow: hang everything loose on the slip joints, set your muffler and tip position, tack weld the joints in place on the car, then pull the system and finish-weld it on the bench. The 5 inch joint depth is what makes that adjustability possible.

Budget for the muffler and resonator separately since neither is included. If you're going the race route, SpeedFactory's own LT-5 muffler is the natural pairing; for street builds, a resonator mid-pipe plus a quality chambered muffler keeps a 3 inch system livable. Either way you're building exactly the system your car needs instead of settling for whatever a catalog cat-back decided for you, and for a boosted build, that flexibility is the whole point.