| Great Power GP 230cc Twin Gas Engine | probuild-uk.co.uk | 2079.17 GBP | 2,395 GBP | −13.2% |
| Great Power GP 88 Single Gas Engine | probuild-uk.co.uk | 637.5 GBP | — | — |
| GP 76 muffler kit | probuild-uk.co.uk | 150 GBP | — | — |
| GP 123 muffler kit | probuild-uk.co.uk | 137.5 GBP | — | — |
| GP 38 stock muffler kit | probuild-uk.co.uk | 67.5 GBP | — | — |
| GP 61 stock muffler kit | probuild-uk.co.uk | 67.5 GBP | — | — |
| GP 76 carburettor set | probuild-uk.co.uk | 63.33 GBP | — | — |
| GP Engines 61cc / 123cc Piston Kit | probuild-uk.co.uk | 52.49 GBP | — | — |
| GP 88 hub set – Replacement GP 88cc Prop Hub | probuild-uk.co.uk | 45.83 GBP | — | — |
| GP 178 propeller plate | probuild-uk.co.uk | 23.33 GBP | — | — |
| GP 38 reed valve set | probuild-uk.co.uk | 15.83 GBP | — | — |
| GP 76 Reed valve set | probuild-uk.co.uk | 15.83 GBP | — | — |
| GP 123 Reed valve set | probuild-uk.co.uk | 15.83 GBP | — | — |
| GP 88 prop washer | probuild-uk.co.uk | 15 GBP | — | — |
| GP hub screw fits 38, 61, 76, 88, 123 and 178 | probuild-uk.co.uk | 13.75 GBP | — | — |
| GP 61, 88 Reed valve set | probuild-uk.co.uk | 12.5 GBP | — | — |
| GP 38 throttle arm | probuild-uk.co.uk | 10 GBP | — | — |
| GP 178 Propeller Bolts M6x55 (6pcs) | probuild-uk.co.uk | 8.32 GBP | — | — |
| GP 123 Propeller Bolts M5x50 (6pcs) | probuild-uk.co.uk | 7.08 GBP | — | — |
| GP 38 Propeller Bolts M4x40 (4pcs) | probuild-uk.co.uk | 5.83 GBP | — | — |
| GP 61 & GP 76 Propeller Bolts M5x45 (4pcs) | probuild-uk.co.uk | 5.83 GBP | — | — |
| GP 123 Reed Valve Petal | probuild-uk.co.uk | 5.46 GBP | — | — |
| GP muffler washer 2pcs (38, 61, 88) | probuild-uk.co.uk | 5 GBP | — | — |
| GP cylinder gasket for GP123, GP 61 | probuild-uk.co.uk | 4.58 GBP | — | — |
| GP Hub Magnet for GP38, 61, 76, 88, 123, 178, 230 | probuild-uk.co.uk | 4.17 GBP | — | — |
| GP 38 crankcase bolts m5x18 (4pcs) | probuild-uk.co.uk | 3.33 GBP | — | — |
| GP 61 crank case gasket | probuild-uk.co.uk | 3 GBP | — | — |
| Cylinder gasket GP 38, 76 | probuild-uk.co.uk | 2.91 GBP | — | — |
| GP123 Reed valve gasket F3 between flange and carburet plate | probuild-uk.co.uk | 2.91 GBP | — | — |
| GP123 crankcase gasket | probuild-uk.co.uk | 2.91 GBP | — | — |
| GP 88 & GP 178 Exhaust Gasket (1pc) | probuild-uk.co.uk | 2.91 GBP | — | — |
| GP 38 m5x25 (2pcs) | probuild-uk.co.uk | 2.91 GBP | — | — |
| GP 76 Reed valve gasket F3 between flange and carburettor plate  | probuild-uk.co.uk | 2.5 GBP | — | — |
| GP 61cc / 88cc Reed Valve petals | probuild-uk.co.uk | 2.49 GBP | — | — |
| GP 61, 88 Reed valve gasket | probuild-uk.co.uk | 2.08 GBP | — | — |
| GP123 carburettor gasket  | probuild-uk.co.uk | 2.08 GBP | — | — |
| GP123 Reid valve gasket F1 between crank case and flange  | probuild-uk.co.uk | 2.08 GBP | — | — |