ISR Performance Nissan 240sx KA24DE Header

The ISR 4-2-1 Stainless Steel Header Expanded to a 3" Flange to enable easy bolt on application to stock cat or the Ace Up 3 inch catalytic converter and exhaust system. 

4-2-1 Designed headers, also known as Tri-Y's produce significant gains at mid range horsepower levels and a better suited for the street than 4-1 designed headers. 

Whats in the Box:

• 1x exhaust manifold gasket
• 1x 2 bolt 3" gasket 
• 1x 4-2-1 tubular Header

** All ISR Performance Products are Designed for Off Road Use Only **

LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY