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Rasp Terminator w/Crossover for 2001 to 2006 BMW M3

The Rasp Terminator w/Crossover Pipe (aka RTX)
by Custom Performance Innovations

KILL THE RASP AND INCREASE THE POWER. The Rasp Terminator with Crossover pipe (the RTX) is the 4th generation of Rasp Terminator. The original Rasp Terminator was developed by Custom Performance Innovations to solve the single most complaint heard among BMW M3 owners - the exhaust rasp noise. This hideous exhaust noise is emitted from any 2001 to 2006 BMW E46 M3. There is nothing wrong with the engine, it's just a matter of physics - a combination of high compression, variable valve timing, and cylinder head exhaust port design that causes a high-pitched, metal-rattling sound (i.e., the rasp) that is very loud and noticeable when the engine is revving at or above 4,000 rpm. The front section of the exhaust system - also known as section 1 - (shown below) is where this high-pitch rasp noise emanates and is the best location to terminate it.

Stock Section 1 (small single resonator)

RTX Installed

The RTX is a direct replacement for the original section 1 and it not only completely eliminates the rasp, you can expect 3 to 5hp increase as well as a 2 to 4 ftlb increase in torque!

It is made from 2.365-inch mandrel bent, 304 stainless steel (16 gage), with a polished 304 stainless steel resonator. The RTX uses a crossover to balance exhaust pressure which results in improved throttle response and "sound wave cancellation". The two straight-through performance resonators completely and permanently eliminate the rasp while allowing for a free-flowing exhaust. The stainless steel flanges are TIG welded for strength and durability.

The new RTX is now available with an introductory price of $459.00 which that includes shipping to anyway in the lower 48 States.

Dyno Comparison

RTX installed on a 2004 BMW M3 with a completely stock exhaust. Note this M3 also has Active Autowerks performance software. Baseline, stock HP/TQ curve in blue. RTX HP/TQ curve in red.

4-hp and 3-lbft of torque gain in the midrange.

Here it for yourself.

The new RTX is now available with an introductory price of $459.00 which that includes shipping to anyway in the lower 48 States.

Follow the reviews, pictures, and comments about the RTX on the M3 Forums

CLICK HERE to purchase