PERRIN Performance mufflers have a true 3" internal diameter for uninterrupted exhaust flow .
PERRIN mufflers and flange connections are 3" throughout the entire length, not necked down, for ultra smooth transitions throughout the system.
An oversized 4" slash cut exhaust tip adds an aggressive look to this impressive system.
PERRIN exhaust tips are a high polished, single wall construction and will not dis-color with extreme heat.
PERRIN performance exhaust systems features high tech v-band clamps for a perfect exhaust connection. V-band clamps are designed to hold hundreds of pounds of pressure and do so without the need for a gasket! This connection allows for a precise repeatable joint with the ability to rotate each joining connection. This allows for easy installation, and alignment adjustments for a perfect fit every time.
PERRIN Performance exhaust systems are made entirely of 304 stainless steel, inside and out. 304SS provides high corrosion resistance, and is excellent for extreme heat up to 1800 degrees.
Other manufactures and OEMs, will use cheaper 409 stainless steel which will rust and corrode over time but the added expense of 304 stainless steel is well worth the beautiful and long lasting high polish, and durability.
This graph shows a stock exhaust Vs the PERRIN exhaust on an 2007 WRX. Each run was only 10 min. apart.
The PERRIN exhaust system gained 15WHP and 15 lbs of tq.