01635 247477
Unit i3, Gidley Farm, Chieveley, Newbury, Berkshire, RG20 8TX, England
New products
latest from our store-
Hardrace 370Z rear camber arms – hardened rubber
£259.67 -
H-Dev air temp sensor
£39.99 -
8HP45 8HP70 8HP90 MaxxECU firmware flash
£149.99 -
MaxxECU Exhaust gas temperature sensor 1.8m 4.7mm
£84.00 -
MaxxECU GM Corvette C6 (E38 ECM) MaxxECU PRO Plugin EXTRA
£2,668.81 -
MaxxECU Porsche 996 turbo 2001-2005 MaxxECU PRO Plugin STANDARD
£2,659.97 -
MaxxECU PRO PREMIUM (ECU, harnesses, accessories and LSU 4.9)
£2,580.39 -
MaxxECU PRO PREMIUM (ECU, harnesses, accessories and LSU 4.2)
£2,545.02 -
MaxxECU GEN2 RACE, with Dual LSU 5.2, flying lead install kit
£2,445.02 -
MaxxECU GEN2 RACE, with LSU 5.2, flying lead install kit
£2,339.76
Mapping & dyno hire
We can map most popular ECUs on our 2wd Dyno Dynamics rolling road
Servicing & part fitting
Fully equipped to carry out any work on your car. From a boost valve fitting to full engine rebuild.
Suspension Setup
Our operators understand the theory of suspension system setup and bring about the best results.
Online
Shop
Mail order performance parts for the 350Z, 370Z, GT86 and most other cars
Recent news
Latest news from Horsham Developments-
Ultima GTR build update – July 24
Just a small update on how the Ultima project is coming along, some progress has been made in a few areas of the car... to start,…Read More -
PAAA AGM
28th March 2024 was the Performance Automotive Aftermarket Association (PAAA) annual general meeting at Silverstone. The main focus on this event was a discussion surrounding safe…Read More -
Ultima GTR build
We're building an Ultima GTR - this has got to be one of the most drawn out projects ever. We've had the kit for over 10…Read More -
VQ35DE full rebuild
A good customer of ours brought in his 350Z as the engine was in bad shape. We chose to go for our fully forged rebuild. This…Read More -
350Z HR VQ35HR high idle fix
High idle problem on 350Z with HR engine? There is a bug in the 350Z HR ECU (with the VQ35HR engine) that can make the idle control…Read More -
Dyno power figure calculator
There is often a lot of chat about how to compare power figures from various dynos. Some dynos read higher or lower than others. Here is…Read More -
VQ35 twin turbo build
A few pictures of the H-Dev VQ35 twin turbo project. It's spec'd to do up to 800bhp. Parts used: CP pistons Manley rods Kelford cams ARP…Read More -
Ohlins install
Lovely 350z HR in for a full Ohlins Road and Track coilover install, camber arms, droplinks and full geometry set upRead More
