Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| THM 250, 250C, 350 & 350C | ||||
| Extension | ||||
| Without M31 or MV4 | GMO | 8640840 | 0.00 | |
| With M31, MV4 | GMO | 14008966 | 0.00 | |
| THM 400 | ||||
| Extension Assembly | GMO | 8679979 | 137.01 | Contact Dealer for most current part and price information. |