Exhaust Manifold For BMW E30 320I[e-Catalog]

Product Attribute:

Surface Finish:Polished

G.W:7kg

Color:Silver

Certification:FCC

Material:Stainless Steel

Applicationt: 

Honda

Production Description:

Various exhaust designs have evolved over the years from theory, but the majority are still being built from 'cut & try' experimenting.  Only lately have computer programs like X-design or high end engine simulation programs been able to help in this process. Practical tools like adjustable length primary pipes and our B-TEC and DynoSYS adjustable collectors allow quicker design changes on the dyno or in the car.  When considering a header design, the following points need to be considered:

• 1) Header primary pipe diameter (also whether constant size or stepped pipes).
• 2) Primary pipe overall length.
• 3) Collector package including the number of pipes per collector and the outlet sizing.
• 4) Megaphone/tailpipe package.

There are many ideas about header pipe sizing. Usually the primary pipe sizing is related to exhaust valve and port size. Header pipe length is dependent on wave tuning (or lack of it). Typically, longer pipes tune for lower r.p.m. power and the shorter pipes favor high r.p.m. power. The collector package is dependent on the number of cylinders, the engine configuration (V-8, inline 6, etc.), firing order and the basic design objectives (interference or independence).  The collector outlet size is determined by primary pipe size and exhaust cam timing.