These are POLY motor mounts that fit 99-06 GM LS-equipped trucks including Silverado, Sierra, Tahoe, Yukon, Yukon XL, Suburban, Denali, Avalanche, and Escalade. They are a direct bolt up using factory hardware. These utilize a polyurethane bushing and 9/16″ bolt to isolate vibration from the engine to the frame while still being much stronger than factory mounts. These are laser cut 3/16″ steel fully mig welded. All brackets will ship raw ready for your paint or painted for a small fee. They match factory measurements so the engine remains in the same location as stock.
Yes these will work with the Hooker turbo manifolds. Although it is tight fit my mounts clear the manifolds with no modifications necessary.
Mount Height: This is a new option I added that lowers the engine 1″ from the stock position. This is generally only for the serious racer that has a good reason to do this. Lowering more than 1″ will require a lot of work. The main clearance items will be the steering line fitting under the oil pan on top of the steering rack, and the crossmember behind the engine at the bottom of the oil pan. A 1″ drop should clear these fine, but modifications may be necessary on your particular truck. The 3 main reasons for wanting to lower the engine will be:
- Additional cowl clearance for large intake or intercooler
- Lower CG and better instant center position for the suspension
- Improves pinion angle with lowered vehicles since it will raise the exit angle of the transmission
Lowered mounts are only sold in pairs.
The following only applies if you are doing a factory V6 to V8 Swap. If you already have a V8 ignore this section:
If you are doing a V6 to V8 swap you will need the V8 frame mounts from the same 2wd/4wd as your truck is. The frame side mounts are different for 2wd and 4wd and V6 to V8. My mounts are designed to work on the V8 frame mounts. The GM part numbers for the frame mount are:
15113847 RH fits both suspension styles
15113848 LH fits coil spring frame
15113849 LH fits torsion bar frame