N1-X Evolution Extreme Mid-Pipe (Resonated & Non-Resonated)
2015+ Lexus GS-F
The N1 Evolution Extreme is based on the proven performance basics of the N1 muffler. Optimum exhaust efficiency is achieved through the mid-pipes running parallel between the catalytic converter and rear muffler section. The H-style piping design was opted to equalize the pressure in both exhaust pipes. Our unique modular design allow the mid-pipes to be interchangeable with the factory OEM exhaust system components along with the rear section which is sold separately.
PRODUCT FEATURES:
- High-level of quality using tig-welded SUS304 stainless steel uniting quiet performance with high-power performance gains - Matched and manufactured for select chassis - Patented Megaphone piping structure to produce excellent torque and throttle response throughout the powerband. This piping design allows for a swirling exhaust gas flow effect that has for years produced proven results - Compatible with the N1-X Evolution Extreme rear section part number 164-KT12 (Titanium Tips) or 164AKT12 (Stainless Steel Tips)
| Bolt-On | Yes |
|---|---|
| Part Number |
- 144-KT12: Resonated - 144-KT12P: Non-Resonated |
| Year | 2016, 2017, 2018. 2019, 2020, 2021 |
| Make | Lexus |
| Model | GS-F |
| Body Style | 4-Door Sedan |
| Engine | 2UR-GSE |
| Chassis | USC10 |
| Exhaust Type | N1 Evolution Extreme Muffler (N1-X) |
| Piping Diameter | 65mm. x 2 - 50mm. x 4 |
| Pieces | 3 |
| Piping Material | SUS304 Stainless Steel |
| System Weight | Mid-pipe only 25.90 lbs. (Stock- 35.50 lbs.) 7.6 lbs. lighter than OEM |
| Sound Level | Sound Level (with part # 164-KT01 or 164AKT01): 92.2 dB @ 4,500 RPM. |
| Special Notes | Modular design-> Mid-pipe and Rear Section can be interchanged with factory exhaust components. |
 |
WARNING: California Prop 65 Cancer & Reproductive Harm www.p65warnings.ca.gov |
| Brand | A'pexi |
|---|---|
| Type | Exhaust |
| SKU | 144-KT12P |
| Weight | 30.0 lb |
| Make | ["Lexus"] |
| Model | ["GS-F"] |
| Material | ["gid://shopify/Metaobject/91049197865","gid://shopify/Metaobject/90679279913"] |
| Manufacturer Type | ["gid://shopify/Metaobject/90137755945"] |
Shipping: Some items may qualify for free shipping with Local Pickup in store. All orders have a 2–3 business day processing time. Some orders may have extended shipping times based on current stock status — we'll confirm the lead time at order placement.
Returns: Accepted within 30 days of delivery for unused product in original packaging. Returns are subject to a 25% Restocking Fee. Special-order and custom-built items are final sale.
Warranty: All products carry the manufacturer's full warranty. Coverage is honored through PMD as your authorized dealer.
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