Quick Verdict
If you're deciding between the Crusader 7.4 XLi fuel lines and the exhaust riser manifold, the key difference is which part of the engine you're working on. Both of these used Mercury parts come from a fresh-water-only boat and are described as in good used condition. The fuel lines are listed at the lower price, and the exhaust riser manifold is the higher-priced item. Match the part to the system you're repairing: fuel delivery for the lines, exhaust routing for the manifold.
Price and Attribute Snapshot
| Item | Listed Price | Price Bar | Condition | Part No. | Origin |
|---|---|---|---|---|---|
| Crusader 7.4 XLi 454 GM V8 Inboard Marine Engine gas fuel lines tubes | USD 162.75 | Used | - | United States | |
| Crusader 7.4 XLi 454 GM V8 Inboard Marine Engine exhaust riser manifold | USD 246.45 | Used | 98126 | United States |
Where Each Part Wins
The fuel lines win for buyers who want the lower listed price and are replacing fuel plumbing on the Crusader 7.4 XLi. The exhaust riser manifold wins for buyers doing exhaust-side work and wanting a part with more identification details in the listing. Both parts are used and come from a fresh-water-only engine source, so the decision is about which system you're repairing.
Product Notes
Crusader 7.4 XLi 454 GM V8 Inboard Marine Engine gas fuel lines tubes

This used fuel line set is an option if you're handling fuel delivery on the Crusader 7.4 XLi. At USD 162.75, it's the lower-priced part in this comparison, and the listing notes good used condition and removal from a fresh-water-only boat. The photos are meant to show exactly what's included, and mounting hardware only comes along if it appears in the images. One limitation is that there's no manufacturer part number listed, so you'll need to match the visible line routing and fittings against your own setup. The description confirms the set came from a Crusader 7.4 XLi 454, so it's a direct reference for that engine family. If you're careful about visual matching, this is the more budget-conscious choice.
Crusader 7.4 XLi 454 GM V8 Inboard Marine Engine exhaust riser manifold

The exhaust riser manifold is the higher-priced listing at USD 246.45, but it includes manufacturer part number 98126, which is a useful reference when confirming the exhaust component. It's also described as good used condition and removed from a fresh-water-only boat, matching the source of the fuel lines. The listing states that what's shown in the photos is what's included, with mounting hardware only if visible. The main limitation is its higher listed price, so you're paying more for a part that shares the same used condition and source. If your repair is on the exhaust side and you want a part number to cross-check, this is the one to consider.
Final Choice by Use Case
Go with the fuel lines if your project is about replacing fuel lines on the Crusader 7.4 XLi and you want the lower listed price. Go with the exhaust riser manifold if you're working on the exhaust system and the extra identification detail in the listing is important to you. Either way, both parts are used Mercury components from a fresh-water-only boat and carry the same condition description.