Exhaust› Headers, Manifolds and Components

Motordyne

Long Tube Headers with High-Flow Catalytic Converters

$3,991.37

SKU: MD-027/028

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Motordyne MD-027/028 is a set of long tube headers with high-flow catalytic converters designed for performance enhancement. These headers are constructed from 304L stainless steel alloy, ensuring durability and resistance to corrosion.
Show original supplier description
The Motordyne Long Tube Headers with High-Flow Catalytic Converters (MD-027/028) are engineered to significantly improve the performance of your vehicle's air and fuel system. Crafted from premium 304L stainless steel alloy, these headers are built to withstand high temperatures and resist corrosion, ensuring longevity and optimal performance over time. Designed as a direct replacement for stock components, these long tube headers aim to increase exhaust flow, which can lead to noticeable gains in horsepower and torque. The integrated high-flow catalytic converters help to maintain emissions compliance while minimizing backpressure, allowing the engine to breathe more freely. Fitment is specifically for the 2009-2018 Nissan 370Z models. It is crucial to confirm fitment with your specific vehicle before placing an order to avoid potential issues. If an issue occurs due to an error on our part, including situations where an incompatible setup was recommended by the sales team, Fitment Industries will work with you to make it right. If the sales team confirms fitment and the product does not fit, it can be returned with no restocking fees, provided the item is in like-new condition.
Vehicle Symptoms
  • Loud exhaust drone under acceleration
  • Check engine light on for catalyst efficiency
  • Loss of low-end torque after header install
  • Exhaust smells rich or sulfur-like at startup
Diagnostic Codes
  • P0420 – Cat Sys Efficiency Below Threshold (B1)
  • P0430 – Cat Sys Efficiency Below Threshold (B2)
Relevant Conversations
  • P0420 code after long tube header install fix
  • Will long tube headers with high flow cats pass inspection?
  • Difference between catless and high flow catted headers
  • Long tube headers drone issue how to fix
  • Best long tube headers for Motordyne MD-027 028
  • Check engine light after header swap solutions
  • Headers loss of torque dyno results forum
  • High flow catalytic converter vs stock flow comparison
  • Installing long tube headers weekend job difficulty
  • Sulfur smell from exhaust after new headers

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMotordyne
Part NumberMD-027/028
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy