I want to put throttle bodies & cams in a Calibra 2.0L 16v, will they fit under the bonnet or catch on the brake master cylinder?
The throttle body kit MT196 will fit without fouling the brake master cylinder. However you will have to move the brake pipes coming out of the master cylinder using the brake mod kit supplied.
I'm interested at the Tarmac exhaust manifolds. I would like to know the diameter of the primary and secondary tubes, and if is possible to fit it in Vauxhall Calibra engine compartment? Alternatively should I have a 4 to 1 if the above manifold will not fit?
BTB Exhaust have made our exhausts & manifold systems for many years; the design, construction & accuracy has always been to a high standard & we have been able to develop increased performance with their help. Unfortunately, in recent times many companies have appeared on the market claiming to produce systems of equal or better quality, this has caused us quite a few problems when people have bought inferior products & then found their engines don't produce the performance that we have quoted, we have then received phone calls & emails asking us why the engines do not perform. We have found it difficult in recent times to be competitive selling the high quality BTB manifolds, so we have now asked BTB to deal direct with any customers of ours & supply the systems at the cost we would pay for a single item.
We are continuing to develop new designs of manifold to work in line with the ever increasing performance of our engine specifications. When an engine kit is purchased from us, we will supply a drawing so that the manifold can be made to suit that specification. The drawings can be purchased separately, so you can have the manifold made by a company of your choice however if it is not made exactly to our specifications, you will not get the performance.
The diameters of the primary pipes are 1.7/8" and the secondaries are 2.1/8". The outlet diameter into the first part of the system is 2.5". This was then stepped up to 70mm to match onto the works exhaust systems
I would not recommend a 4 into 1 exhaust manifold. It only produces peak power and loses dramatic amounts of mid range and lower end torque and our design of exhaust manifold is superior in every way.