PRODUCT DETAILS
Innovative Mounts 12-15 Civic Si Steel Rear Mount - Part #91430
This is the steel rear engine mount for the 2012-2015 Civic Si. It is the steel version of B91430 at about thirty two dollars less.
What It Is and Why It Works
Steel construction with no-tear polyurethane bushings, replacing the OEM fluid filled mount. The rear position takes the torque reaction, and on a K24 making 200 lb-ft the factory mount is the first thing to let the drivetrain rock. Replacing it tightens up throttle transitions and shift feel.
75A is the durometer for a street driven Si. 85A for track or boost. 95A is race territory.
Specs
| Position | Rear engine mount |
| Mount body | Steel |
| Engine | K-series |
| Transmission | Manual |
| Chassis | 12-15 Honda Civic Si FB6, FG4 |
| Bushing | No-tear polyurethane, 75A, 85A or 95A |
| Warranty | Lifetime (per manufacturer) |
Available Options
| Durometer | Color | Best For | SKU |
| 75A | Black | Street driven Si, 250 to 400hp | 91430-75A |
| 85A | Grey | Track or boosted, 400 to 500hp | 91430-85A |
| 95A | Red | Drag and race, 500hp plus | 91430-95A |
Fitment
| Year | Make | Model | Trim | Engine |
| 2012-2015 | Honda | Civic | Si FB6, FG4 with manual transmission | K24 |
Si cars only. A non-Si 12-15 Civic runs an R-series engine and uses different mounts entirely. The billet version of this mount is B91430.
What to Know Before You Buy
Steel against billet is about thirty two dollars here. Both use the same bushings and hold the same location, so steel is the honest pick unless the bay is on display.
Si only on the ninth gen. The R18 powered cars share the chassis but not the drivetrain, and this is a K-series part.
75A on a street car. Mounts cannot be returned once they have been bolted down.
Si cars only. A non-Si 12-15 Civic runs an R-series engine and uses different mounts entirely. The billet version of this mount is B91430.