E21exhaust

E21 Exhaust

Korman-Stahl Headers

Check local emissions laws before ordering.

These high quality headers provide a 6-10% power increase on stock engines, much more on high performance engines. Engineered for trouble free fit and long service. Also available with ceramic thermal barrier coating (described below) for additional performance, durability and improved appearance.

Primary Tube Size	Collector	Notes	Application	P/N
1 3/8"	stock	stock engine	320i 77-79	18213138
1 1/2"	stock	modified engine	320i 77-79	18213150
1 1/4"	bolt to cat. conv.	stock engine, has O2 sensor fitting	320i 80-83	18213114L
1 3/8"	bolt to cat. conv.	modified engine, has O2 sensor fitting	320i 80-83	18213138L
1 1/4"	no cat	Euro Model	320i 80-83	18213114E
1 3/8"	no cat	Euro Model	320i 80-83	18213138E
1 1/2"	standard floor	competition, 2.5" collector	320i ALL	18223150
1 5/8"	standard floor	competition, 3" collector	320i ALL	18223158
1 3/4"	standard floor	competition, 3" collector	320i ALL	18223175
1 5/8"	raised floor	competition, 3" collector	320i ALL	18223158RF
1 3/4"	raised floor	competition, 3' collector	320i ALL	18223175RF

After years of providing 320/6, 323 headers, our suppliers have discontinued them. We will add them to our offerings as soon as we have a reliable source available.

Exhaust Manifold Porting

A careful porting and polishing of the exhaust manifolds. We then precisely mate the exhaust manifold gasket to the exhaust manifold for maximum flow. Especially effective when combined with Ceramic Thermal Barrier Coating. We have several core manifolds on hand often allowing us to ship on an exchange basis and keep your downtime to a minimum.

P/N LAB18213004 All 4 Cyl.

P/N LAB18213006 All 6 Cyl.

Ceramic Thermal Barrier Coating

The ceramic coating provides superior corrosion protection, stain resistance, increased gas velocity and combustion chamber stabilization. Even if scratched or chipped its unique self-sacrificial properties won't allow oxides to form under the coating. Unlike other coatings, both the inside and outside of the exhaust manifold is coated. Expect underhood temperatures to be reduced by 20 or 30%.

6 Cyl. M20 P/N 182110016

4 Cyl. M10P/N 182110014

Performance Plus Exhaust Systems

Free flow systems made in Italy come with a one year warranty. Excellent reduction in back pressure, sporty sound.

Application	Front Section	Rear Section	Notes
320 77-78	18112BA1612 (or Supersprint unit)	NLA	18219056634 installation kit required
320 79>	18BW2046	18BW2067

Replacement Catalytic Converters, 320i 80-83

Free flowing aftermarket units offer excellent value and performance at substantial savings over OE units. 5 year warranty on pipes, 2 year warranty on catalytic converter.

P/N 18BMW1401