Its throught an insurance broker called Brentacre. Type in in goolge.
Brentacre cover modified cars all makes & model’s on a brake horse power limit basis, which allows the vehicle to be modified up to the agreed B.H.P. limit with all other cosmetic & mechanical changes, at no extra cost, (and unlike others we don’t charge admin fees when you advise us of mid term cosmetic mods).
Mods that I have had done have cost me £260. Parts are gonna cost about £1200 fitted so total is still cheaper than buying a 172 or anything.
It wont break down