01-04 Duramax 3.5" KBDP Turbo Horn01 04. 5 Duramax LB7 This is the high flow 3. 5" Turbo horn for LB7 Duramax Adds 15+ Horsepower, faster spool up, lower egt's, more Turbo whistle. Stock horn is only 2 3 8", This is 3 1 2" that is a huge increase in airflow! Does not fit CA Smog Package Trucks without putting a small dent on the turbo horn Comes ready to install with new bolts! Cannot ship to California

•  New AFC housing arm machined for full fuel advance

120-inch wall diameter Up-Pipes

Level 3: 50 HP & 90 lb-ft

all recession depths are checked

These are things that are included in our complete SX-E turbo kit (SKU 122007)

performance testing

The No Limit 6

The MADS Smarty Touch Programmer for your 1998

220 Exhaust

Significant Horsepower gains

The 58mm inducer on the turbo is a very nimble and highly responsive unit

Manual High-Idle is enabled in all softwares