How long does order processing take?

A standard processing time of up to 48 working hours is required before the order is shipped out.

What payment methods do you accept?

We accept PayPal, PayPal Guest Checkout, and major credit/debit cards via PayPal. If you see a different PayPal account name during checkout (e.g., in Chinese), that is our verified merchant account and your payment is handled securely by Top Tuning Boost.

Where do you ship from?

We ship from our US facilities in Fontana, CA 92335 and Pottsville, PA 17901, plus international partners when US stock is unavailable.

What are the shipping options?

Economy Shipping is often free on eligible items. Standard Shipping is $19.99 where applicable. When an item is not in US stock, it ships from international partners (typically 3–14 business days in transit after processing).

How can I check product compatibility (fitment)?

Review product specifications and vehicle fitment notes on each page, or email service@toptuningboost.com with your vehicle year/make/model/trim.

Do you offer returns or exchanges?

Eligible items may be returned within the policy window in new/uninstalled condition with original packaging. Contact service@toptuningboost.com for an RMA before sending anything back.

Order support & contact hours

Email (preferred): service@toptuningboost.com. Phone (urgent only): +1 (323) 922-3454. Business Hours: Mon–Fri | 9am–5pm (GMT-08) Pacific Time.

Legal & usage notice (performance parts)

OFF-ROAD USE ONLY. Some performance parts are not certified for emissions-controlled vehicles and may be illegal on public roads. Customers must verify local laws. Top Tuning Boost will not ship CARB-restricted products into CARB-restricted areas.

GMC Performance Parts & Exhaust Headers | Top Tuning Boost

Exhaust Header for 1996-2001 Chevrolet Chevy S10 Blazer GMC Sonoma Jimmy 4.3L V6 4WD

Sale

Exhaust Header for 1996-2001 Chevrolet Chevy S10 Blazer GMC Sonoma Jimmy 4.3L V6 4WD

Regular price $146.14 USD

Regular price ~~$231.28 USD~~ Sale price $146.14 USD

Sale
Exhaust Header for 1968-1972 Chevrolet Chevy GMC SUV Pickup Big Block 396/427/454

Sale

Exhaust Header for 1968-1972 Chevrolet Chevy GMC SUV Pickup Big Block 396/427/454

Regular price $223.65 USD

Regular price ~~$393.93 USD~~ Sale price $223.65 USD

Sale
Long Tube Headers For 1988-1997 Chevy/GMC SBC 305/350 5.0/5.7L V8 - C/K 1500/2500, Tahoe/Blazer

Sale

Long Tube Headers For 1988-1997 Chevy/GMC SBC 305/350 5.0/5.7L V8 - C/K 1500/2500, Tahoe/Blazer

Regular price $188.50 USD

Regular price ~~$383.50 USD~~ Sale price $188.50 USD

Sale

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Exhaust Header for 1996-2001 Chevrolet Chevy S10 Blazer GMC Sonoma Jimmy 4.3L V6 4WD

Exhaust Header for 1996-2001 Chevrolet Chevy S10 Blazer GMC Sonoma Jimmy 4.3L V6 4WD

Exhaust Header for 1968-1972 Chevrolet Chevy GMC SUV Pickup Big Block 396/427/454

Exhaust Header for 1968-1972 Chevrolet Chevy GMC SUV Pickup Big Block 396/427/454

Long Tube Headers For 1988-1997 Chevy/GMC SBC 305/350 5.0/5.7L V8 - C/K 1500/2500, Tahoe/Blazer

Long Tube Headers For 1988-1997 Chevy/GMC SBC 305/350 5.0/5.7L V8 - C/K 1500/2500, Tahoe/Blazer

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