Details
BrandKooks Headers
SKUKSH1131H020
GTIN / UPC842422134587
Manufacturer Part Number1131H020
Product Information
A set of 1-5/8 in long tube headers paired with a 2-1/2 in catted X-pipe, built in 16 gauge 304 stainless with 3/8 in thick laser-cut flanges. Long tubes replace the factory manifolds and keep each cylinder's exhaust pulse separate further down the pipe, which helps the engine breathe at higher rpm. The X-pipe carries 400-cell high-flow converters and its 2-1/2 in outlets connect to the factory exhaust; those converters are not meant for supercharged or turbocharged cars.
Specifications
| Type | Long tube headers with catted X-pipe |
| Pipe Diameter | 1-5/8 in primary tubes, 2-1/2 in collectors, 2-1/2 in X-pipe |
| Material | 16 gauge 304 stainless steel, 3/8 in laser-cut flanges |
| Catted or Catless | Catted: Kooks Performance 400-cell high-flow catalytic converters |
| What's in the Box |
|
| Fitment Notes | 4.6L 3V engine, manual or automatic transmission. Stock header bolt pattern. X-pipe outlet connects to the OEM exhaust. Performance cats are not for forced induction |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2005-2010 | Ford | Mustang | Bullitt, GT, Shelby GT |
Shipping
- In stock orders typically ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
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