ASP Headers Civic Si 06-11 Custom Under Car Exit Header. This header is individually designed to match each client's motor specs. The design includes dual diameter runners which allow the lengths to be adjusted for optimum efficiency and full hp:tq potential. The megaphone option is used to maintain the best mid range power. Made in USA.

Choose megaphone, reverse cone, v-band assembly hook up after cat location OR hook up to stock location prior to cat with 2.5" straight pipe and 2.5" 3 bolt exhaust flange.


$1,450.00 USD

Manufacturer: ASP

Part Number: ASP-06SI-HDR

free shipping Fast World Wide Shipping Services Free standard shipping applies to this item within the continental United States. Orders shipped to Alaska, Hawaii, Virgin Islands, Canada, Puerto Rico, Guam, and PO/APO/FPO boxes are subject to additional shipping charges

time Lead Time: 3-4 Weeks

Hook Up
- +

I understand this product is sold for competition use only and it is not legal for vehicles to use on a public road or highway.

California Residents Warning:
Cancer & Reproductive Harm


US grade 304 stainless steel mandrel bends
which are 2 sets of 4 equal length runners, K series machine cut head flange,
1 compact true 4-1 merge collector, 1 Burns megaphone,
1 reverse transition, 1 O2 bung, 4 beehive collector springs, 8 spring tabs,
& 1 v-band assembly or 2.5" straight pipe and stock 3 bolt exhaust flange to substitute megaphone, reverse cone, and v-band assembly.

Matching Chassis:

  • Honda Civic Si FG2 06-11


O2 sensor extension required. When choosing the megaphone, reverse cone option, v-band assembly, exhaust modification will be required. Off road use only.