Innovative Mounts K Swap Rear Sub Bracket 96-00 EK Civic

Innovative Mounts K Swap Rear Sub Bracket 96-00 EK Civic

The K20 is on the stand, the EK is on jack stands, and the back of the block has nothing holding it to the car. That's the job this part does. The Innovative Mounts K Swap Rear Sub Bracket (part 90030-SB) is the steel rear bracket that ties a K-series into a 1996-2000 Civic still running its factory EK/EJ subframe. It is the rear leg of a three-point K swap, and it is only the rear leg. Get the position right before you order, because four other brackets in this family look almost identical in a photo.

What It Is and Why It Works

A K swap into an EK hangs on three points: a left hand bracket at the transmission, a right hand bracket at the engine block, and this rear bracket behind the motor. Innovative Mounts fabricates the 90030-SB from steel, CAD/CAM designs the geometry, and stress analyzes it before it goes into production. It is not a bushing. It is the structure the bushing bolts to, and it holds the rear of a K-series in the spot the rest of the kit expects it to be.

The bracket clears the whole common K-series spread: K20A2 and K20A3 out of an RSX, K20Z1 and K20Z3 out of a Type-S or an 8th gen Si, and the K24A1, K24A2, K24A4 and K24A8 truck and Accord/TSX blocks that most builders end up with. Innovative includes the hardware for the bracket itself and backs it with a lifetime warranty against manufacturer defect.

The important qualifier is the subframe. Innovative builds two rear brackets for the EK: this one for the factory 1996-2000 EK/EJ subframe, and 90031-SB for cars that have swapped to the older 92-95 EG subframe. The EG subframe sits roughly two inches farther back and moves the engine with it, so the brackets are not interchangeable. If you converted to an EG subframe for the axle angles, this is the wrong rear bracket.

Specs

Fitment

Every 96-00 Civic body style is covered, coupe, sedan and hatchback, because the bracket references the subframe and the block, not the shell. What it does not cover is a chassis running the 92-95 EG subframe.

What to Know Before You Buy

Check your subframe before you check out. That single question is behind most of the returns on this family of parts, and once a mount or bracket is torqued down it carries bolt impressions and cannot go back. Crawl under the car, look at where the lower control arm brackets sit, and confirm you have the factory EK piece.

This is a bracket, not a mount. The polyurethane conversion mount that bolts into it is a separate part, and so are the left hand and right hand brackets. If you are starting the swap from scratch, the complete Innovative kit (90050 in steel, B90050 in billet) is the cheaper path than buying three brackets and three mounts individually. Buy this one on its own when you are replacing a damaged bracket or filling a gap in a used kit.

Two things catch people on install. Innovative does not pack printed instructions, so budget an evening and a set of build photos. And the bolts that tie the rear bracket to the subframe are worth sourcing in the right length ahead of time rather than reusing whatever came out of the car. If you are running a K24, plan on the CR-V passenger side post mount bracket as well, because the K24 block does not accept the K20 passenger mount directly.

One honest note on how the car will feel. Innovative deletes the fluid-filled damping the factory mounts use, which is what keeps wheel hop down and torque steer predictable under power. It also means more engine noise and more vibration at idle than stock. That is the trade every K-swapped EK makes, and it is worth knowing before the motor goes in rather than after.