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STILLEN Manuals & User Guides

STILLEN is a premier manufacturer of high-performance automotive aftermarket parts, specializing in exhaust systems, cold air intakes, superchargers, and body styling components.

Tip: include the full model number printed on your STILLEN label for the best match.

About STILLEN manuals on Manuals.plus

Founded by racing legend Steve Millen in 1986, STILLEN (Steve Millen Sportparts, Inc.) is a dominant force in the automotive performance industry. Based in Costa Mesa, California, the company designs, tests, and manufactures high-quality upgrades for a wide variety of vehicles, including Nissan, Infiniti, Toyota, and American muscle cars. STILLEN is renowned for its commitment to performance functionality and durability, offering products that are race-proven and street-legal.

The brand's extensive catalog includes TruPower cold air intakes, cat-back exhaust systems, forced induction superchargers, and AP Racing Radi-Cal brake kits. In addition to power upgrades, STILLEN produces polyurethane body kits, spoilers, and aesthetic accessories designed to enhance vehicle aerodynamics and style. With a focus on precision engineering and OEM-quality fitment, STILLEN provides enthusiasts with reliable solutions to elevate their driving experience.

STILLEN manuals

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STILLEN 508191 Cat Back Exhaust Installation Guide

2 март 2026 година
STILLEN 508191 Cat Back Exhaust Specifications Product: CAT-BACK EXHAUST Part Number: 508191 Compatible with: 2011 NISSAN JUKE Product Usage Instructions Materials Supplied: (1) CAT-BACK EXHAUST (2) HHCS Long M10x1.25 (2)…

TP403215 Trupower By Stillen Cold Air Intake Instruction Manual

28 февруари 2026 година
TP403215 Trupower By Stillen Cold Air Intake Product Specifications: Product Name: TRUPOWER BY STILLEN COLD AIR INTAKE Compatible with: 2024+ TOYOTA TACOMA Part Number: TP403215/TP403216 Product Usage Instructions: Installation Steps:…

STILLEN 402833 HI-Flow Intake Installation Guide

28 февруари 2026 година
STILLEN 402833 HI-Flow Intake Materials supplied (1) Hi-Flow ring (velocity stack) (1) Air filter with clamp (1) Urethane air box (4) 1/4 x 20 bolts (4) lock washers Equipment needed:…

STILLEN Nissan Maxima Rear Diffuser Installation Guide

27 февруари 2026 година
STILLEN Nissan Maxima Rear Diffuser Product Specifications Product: Stillen Rear Diffuser Material: Urethane Finish: Unpainted Installation Method: Self-tapping screws and adhesive tape Product Usage Instructions Pre-Installation Preparation: Before starting the…

STILLEN 304320 Rear Sway Bar Kit Installation Guide

27 февруари 2026 година
STILLEN 304320 Rear Sway Bar Kit Product Specifications Dimensions: Variable Weight: Variable Power Source: Requires batteries Material: Plastic Product Usage Instructions Preparation Before using the product, ensure that you have…

STILLEN 504456 Near Cat Back Exhaust Installation Guide

27 февруари 2026 година
STILLEN 504456 Near Cat Back Exhaust Specifications Product: Near Cat-Back Exhaust Model: 504456 Compatible with: 2011-2013 INFINITI M37 Materials supplied: (1) NEAR CAT-BACK EXHAUST (4) HHCS M10x1.25 (4) M10x1.25 Nuts…

Stillen Hi-Flow Intake P/N 402833 Installation Instructions

водич за инсталација
Step-by-step installation guide for the Stillen Hi-Flow Intake system, part number 402833, for Ford F-150 4WD (2011-2013). Includes materials supplied, required equipment, and detailed instructions with safety warnings.

STILLEN support FAQ

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  • How do I install a STILLEN Cold Air Intake?

    Installation typically involves disconnecting the battery, removing the stock intake tube and airbox, transferring the Mass Air Flow (MAF) sensor to the new tube, and securing the STILLEN airbox and filter. Always follow the specific guide for your vehicle model.

  • What should I do if my Check Engine Light comes on after installation?

    This commonly occurs if the MAF sensor was disconnected while the battery was still connected, or if the sensor is installed backwards. Ensure the battery is disconnected during installation and double-check all sensor connections.

  • How do I paint STILLEN urethane body parts?

    STILLEN urethane components come unpainted. They must be thoroughly scrubbed with scouring powder (like Comet or Ajax) and a Scotch-Brite pad to remove mold release agents. Use an elastomeric or acrylic primer designed for flexible parts before applying the final color.

  • Do STILLEN exhaust systems require welding?

    Most STILLEN exhaust systems are designed as bolt-on kits that do not require welding. They typically use flanges and clamps for installation, making them accessible for DIY enthusiasts with standard tools.