High-Flow Stock Placement Log Manifolds – Audi B5 S4
Designed to outperform and outlast, these high-flow log manifolds are the upgrade your B5 S4 deserves. Constructed from schedule 10 304 stainless steel, they are meticulously welded and back-purged to ensure a flawless interior and maximum durability—built to outlive the car.
Unlike other log manifolds that rely on poor lighting, sandblasting, or distant photos to hide imperfections, these manifolds are built right, with zero compromises. The attention to detail and proper welding techniques eliminate the reputation of low-quality log manifolds flooding the market.
Why Choose These Manifolds?
No corners cut, no shortcuts taken
A true performance upgrade over restrictive stock manifolds
Perfect for hybrid K04 setups or big-power builds
Key points about back purging stainless steel:
Oxidation prevention:
The primary reason for back purging is to prevent the inside of the weld from oxidizing, which can significantly reduce the corrosion resistance of stainless steel.
Maintaining weld integrity:
By shielding the backside of the weld with inert gas, the weld quality is improved, leading to a stronger and more reliable joint.
Applications:
Without back purging, the weld can develop a rough, porous surface on the inside due to oxidation, often described as "sugaring". This can easily break off when used in high temperature scenarios like manifolds, these can then pass through the manifold at high speeds and damage crucial components.
Made to order with a lead time of 2-4 weeks
If you're serious about performance and quality, these manifolds speak for themselves.
Lifetime warranty for the original buyer
